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ShankSouljaBoi
Hey all, how do we know when we have to repeat a that and when not to make the two arms of a clause parallel to each other ? I am very confused with the patterns enlisted below:

1. X that verb and that verb
2. X that verb and verb

In the second pattern is * that * omitted or we dont need it at all ? Or both the structures are always fine. I have seen official answers crediting both patterns as the OA. How do we go about tackling this ? In this question I kept looking for a second that and lost considerable time :(

Tagging experts generis VeritasKarishma DmitryFarber



Hello ShankSouljaBoi,
Thank you for the query. :-)


When the parallel clauses have the same subject, then that may not be repeated.

The dresses that have crystals and (that) belong to the latest collection are on a special promotion for premier customers.


When the parallel clauses have different subject-verb pairs, then that must be repeated.

The doctor said that sedimentary life is the main source of most of the ailments and that everyone must fit in some exercise regime in his/her daily life.



Hope this helps. :-)
Thanks.
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Hi GMATNinja,

I have a question regarding the usage of that in this question,

In this sentence:
A South American bird that forages for winged termites and other small insects while swinging upside down from the foliage of tall trees, the graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are represented in virtually every kind of habitat.

a group of New World tropical birds that includes more than 230 species and is represented in virtually every kind of habitat.
are parallel, so we don't need to repeat "that" after "and'

But, in below question

Researchers have announced that the magnetic fields emitted by one brand of security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.

Even though both clauses are parallel we are still repeating "that".

Which format is correct?
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Hi GMATNinja,

I have a question regarding the usage of that in this question,

In this sentence:
A South American bird that forages for winged termites and other small insects while swinging upside down from the foliage of tall trees, the graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are represented in virtually every kind of habitat.

a group of New World tropical birds that includes more than 230 species and is represented in virtually every kind of habitat.
are parallel, so we don't need to repeat "that" after "and'

But, in below question

Researchers have announced that the magnetic fields emitted by one brand of security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.

Even though both clauses are parallel we are still repeating "that".

Which format is correct?
These are excellent reminders that we can't boil most usage issues down to an ironclad rule. We're talking about two very different sentences here.

Take another look:

Quote:
A South American bird that forages for winged termites and other small insects while swinging upside down from the foliage of tall trees, the graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are represented in virtually every kind of habitat.
First, notice that the phrase "that includes" is functioning as a modifier here. Because "includes" must be paired with a singular noun, it seems to be modifying "a group." The parallel construction "that are" must play the same role and therefore modify the same thing as the first element.

But that doesn't work. I can't write "A group that includes... and that are." So this is wrong because it contains a subject/verb disagreement.

The correct answer contains the construction, "a group of New World tropical birds that includes more than 230 species and is..." Notice two things. First, and most importantly, the subject/verb disagreement has been fixed. And second, this option dropped the second "that." There's no rule governing this, but it's a reasonable thing to do here because the parallel verbs are so close together that there's very little risk of confusion for the reader if "that" is removed.

Put another way, it wouldn't have been wrong to write "a group that includes and that is," but it isn't necessary.

Contrast the above with the other sentence you mentioned:

Quote:
Researchers have announced that the magnetic fields emitted by one brand of security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.
This is a very different beast. "That" in this case isn't modifying a noun. Rather, each "that" is introducing a full clause, giving us what was announced. So it's playing a different role.

Also, notice how far apart the parallel clauses are. Again, it's not technically wrong to remove the second "that," but if you do, it becomes very very difficult to see what should be parallel to what. So "that" is good here, not because it's required, but because it helps clarify the meaning of a more complicated sentence!

The takeaway: if you're not sure about a "rule," there probably isn't one. Instead, ask yourself which construction is clearer and more logical. No memorization required. :)

I hope that helps!
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Hi GMATNinja,

Can someone please help with this: 'a group of New World tropical birds'

I want to understand what is 'a group' modifying? Is it 'graveteiro' or 'the ovenbird family' and why?

Thanks,
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Hi GMATNinja,

Can someone please help with this: 'a group of New World tropical birds'

I want to understand what is 'a group' modifying? Is it 'graveteiro' or 'the ovenbird family' and why?

Thanks,
Hi IGIG,

It modifies the ovenbird family. That's the closest thing it can modify, and (more importantly), that's the one that makes sense in this context. A group of birds is a good way to refer to a family of birds.

1. ... the graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species...
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Dear Friends,

Here is a detailed explanation to this question-
rahulraao
A South American bird that forages for winged termites and other small insects while swinging upside down from the foliage of tall trees, the graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are represented in virtually every kind of habitat.

A. graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are

B. graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and is

C. graveteiro belongs to the ovenbird family, a group of New World tropical birds that include more than 230 species and is

D. graveteiro, which belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are

E. graveteiro, which belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and is

Concepts tested here: Subject-Verb Agreement + Grammatical Construction + Awkwardness/Redundancy

• Collective nouns ("group" in this sentence) are always singular.

A: This answer choice incorrectly refers to the singular noun phrase "group of birds" with the plural verb "are"; remember, collective nouns ("group" in this sentence) are always singular. Further, Option A uses the needlessly wordy phrase "that are", leading to awkwardness and redundancy; the usage of "that" is redundant here, as it can be deleted without a loss of clarity.

B: Correct. This answer choice correctly refers to the singular noun phrase "group of birds" with the singular verbs "include" and "is". Further, Option B correctly acts upon the subject noun "the graveteiro" with the active verb "belongs" to form a complete thought, leading to a complete sentence.

C: This answer choice incorrectly refer to the singular noun phrase "group of birds" with the plural verb "include"; remember, collective nouns ("group" in this sentence) are always singular.

D: This answer choice incorrectly refers to the singular noun phrase "group of birds" with the plural verb "are"; remember, collective nouns ("group" in this sentence) are always singular. Further, Option D fails to form a complete sentence; "forages", "swinging", "belongs", "includes", and "are" are all parts of modifying phrases, there is no active verb to act upon the subject noun "the graveteiro". Additionally, Option D uses the needlessly wordy phrase "that are", leading to awkwardness and redundancy; the usage of "that" is redundant here, as it can be deleted without a loss of clarity.

E: this answer choice fails to form a complete sentence; "forages", "swinging", "belongs", "includes", and "are" are all parts of modifying phrases, there is no active verb to act upon the subject noun "the graveteiro".

Hence, B is the best answer choice.

All the best!
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