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# HELPER VERBS - REPLACING MAIN + HELPER VERBS IN SAME TENSE

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Intern
Joined: 04 Oct 2017
Posts: 40
HELPER VERBS - REPLACING MAIN + HELPER VERBS IN SAME TENSE  [#permalink]

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13 Apr 2018, 09:14
Dear Experts and fellow members,

Hi.

I am facing some trouble with helper verbs, commission of verbs and their tenses.

I'll try to clear my doubts by using some examples:

1. I walk faster than Mike walks. CORRECT.

2. I walk faster than Mike walks. CORRECT.

3. I walk faster than Mike does. CORRECT.

4. A lion can run as fast as a tiger can run. CORRECT

5. A lion can run as fast as tiger can. CORRECT.

7. Fred will rent a canoe before Silvia does. CORRECT Source: Magoosh Blog.

First part of the comparison.

Verb form = will rent

Nature = helper + main verb

Second part of the comparison.

Verb form = does

Nature = helper

Conclusion: helper verb of the form "TO DO" can stand in for helper + main verb forms.

THEN IS THE FOLLOWING SENTENCE WRONG?

8. A lion can run as fast as a tiger does. CORRECT OR INCORRECT?

AND WHAT ABOUT THE FOLLOWING SENTENCE?

9. A lion can run as fast as a tiger runs. CORRECT OR INCORRECT?

Would really like your thoughts on this one.

I have really split my hairs trying to understand whether the last 2 are correct or not.

Thanks a lot!

Parth Jain
Intern
Joined: 04 Oct 2017
Posts: 40
HELPER VERBS - REPLACING MAIN + HELPER VERBS IN DIFFERENT TENSES  [#permalink]

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13 Apr 2018, 09:42
Dear Experts and fellow members, @verbalninja

Hi.

I am facing some trouble dealing with helper verbs that replace main + helper verbs in a change of tense.

# 1. I HAVE never SEEN an aardvark, but last year my father DID. - WRONG. (THIS IS FROM MGMAT) (because the first instance of the verb should match the helping verb in tense)

# 2. Since 1990 the global economy HAS GROWN more than it DID during the 10,000 years from the beginning of agriculture to 1950 - CORRECT OG OA.

I can't understand why the first sentence is wrong.

Also, is the following sentence correct?

#3. John has always eaten more meat than Paul does.

Thanks a lot!

Parth Jain
HELPER VERBS - REPLACING MAIN + HELPER VERBS IN DIFFERENT TENSES   [#permalink] 13 Apr 2018, 09:42
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