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1) Some researchers ______ for links between mobile

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1) Some researchers ______ for links between mobile [#permalink] New post 22 Sep 2010, 19:48
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1) Some researchers ______ for links between mobile telephone use and health problems.

Which of the following verbs would be most appropriate for use in the above sentence?
(A) have looked
(B) had looked
(C) looked

2) James ______ the science exam for the fourth consecutive time.

Which of the following verbs would be most appropriate for use in the above sentence?

(A) has failed
(B) had failed
(C) failed

Source - Bell Curves.

Please explain why the chosen verb tense is correct and why the others are wrong. I promise to give a kudos for each good explanation.

Will post OAs soon.
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Re: Simple SC [#permalink] New post 22 Sep 2010, 20:08
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My input in green below.

hemanthp wrote:
1) Some researchers ______ for links between mobile telephone use and health problems.

Which of the following verbs would be most appropriate for use in the above sentence?
(A) have looked
(B) had looked
(C) looked
Grammatically, every single choice is correct IMO. But the most suitable one is "A". "B" looks a little odd as after the use of "had", we need one more clause using simple past tense. For instance, in case of option B this sentence would be ok, "Some researchers had looked for links between mobile telephone use and health problems, when Dr.Tim started his project".
So IMO "A".


2) James ______ the science exam for the fourth consecutive time.

Which of the following verbs would be most appropriate for use in the above sentence?

(A) has failed
(B) had failed
(C) failed

Again "B" is not looking good here for the same reason mentioned above. In A & C, I have doubts. :roll: Normally, we are told that when we use present perfect tense (option A), that mean that a work is started in present & is still continuing. I am confused between A & C. But will take my chance for option "C".
So IMO "C".


Source - Bell Curves.

Please explain why the chosen verb tense is correct and why the others are wrong. I promise to give a kudos for each good explanation.

Will post OAs soon.


My input is just for a healthy discussion, not for kudos!.
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Re: Simple SC [#permalink] New post 22 Sep 2010, 20:31
I will go for 1. A and 2. A

1. A for the same reasons as explained by Hussian15 and 2. A because I believe we need "has" here.
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Re: Simple SC [#permalink] New post 22 Sep 2010, 22:16
The OAs are A and C.
So Hussain gets both right. I got both of these wrong. The OEs werent great.
These are slightly tricky. I am not confused between simple past and present perfect. I know what they are in theory but which one to use when is slightly confusing.

Any light on some basics will be helpful.
Kudos to Hussain for a good effort.
Thank you.
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Re: Simple SC [#permalink] New post 22 Sep 2010, 23:07
hemanthp wrote:
The OAs are A and C.
So Hussain gets both right. I got both of these wrong. The OEs werent great.
These are slightly tricky. I am not confused between simple past and present perfect. I know what they are in theory but which one to use when is slightly confusing.

Any light on some basics will be helpful.
Kudos to Hussain for a good effort.
Thank you.


Check this great effort by gmat club team
gmat-grammar-book-verbs-96445.html

Also do go through the detailed verbal grammer book here
gmat-grammar-book-96532.html

Best of luck!!
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Re: Simple SC [#permalink] New post 22 Sep 2010, 23:29
1. A - Have looked is appropriate as stated by Hussain.

2. C- this event is not ongoing. It is completed somewhere in th past. Thus simple past tense is used.
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Re: Simple SC [#permalink] New post 23 Sep 2010, 01:06
1.A & 2.C

The 1st one was pretty simple keeping the tense in mind.
Second one got me thinking between A & C. C make the sentence look clean and better, so C.
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Re: Simple SC [#permalink] New post 23 Sep 2010, 02:24
hemanthp wrote:
1) Some researchers ______ for links between mobile telephone use and health problems.

Which of the following verbs would be most appropriate for use in the above sentence?
(A) have looked
(B) had looked
(C) looked

2) James ______ the science exam for the fourth consecutive time.

Which of the following verbs would be most appropriate for use in the above sentence?

(A) has failed
(B) had failed
(C) failed

Source - Bell Curves.

Please explain why the chosen verb tense is correct and why the others are wrong. I promise to give a kudos for each good explanation.

Will post OAs soon.


The As are present perfect tenses, Bs are past perfect and Cs are past tense. Past perfect tense is used to show that an event happened in the past prior to another event in the past. Past tense shows that an event happened in the past. Present perfect expresses an event that has present consequences. For example;

The boy saw the car. (Emphasis is on the fact that the boy saw the car.)
The boy has seen the car. (Emphasis is on the present state of the boy, resulting from the fact that he saw the car.)

Also,

Example A: How does John feel about the test? John is nervous about his test, but he has prepared, so I think he'll do fine.

Example B: What did John do last night? Last night, John watched some TV and prepared for the test.

Notice that in example A, we're talking about something happening in the present, but it's necessary to mention something that happened in the past.

In example B, we're telling a story about the past.

So an understanding of the context would signify which tense to use.
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Re: Simple SC   [#permalink] 23 Sep 2010, 02:24
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