identify the sentence in formal written English

English
Tutor: None Selected Time limit: 1 Day

I'd studied more.

I should have studied more.

I should of studied more.

I shoulda studied more.

Feb 27th, 2015

I should have studied more.

best me please dear

Feb 27th, 2015

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Feb 27th, 2015
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Feb 27th, 2015
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