[ Present Perfect Simple ]
Which auxiliaries do we use in the present perfect simple?
A. Did
B. Have/has
C. Do/does
Select your answer:
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Modal Verbs › ViewTo improve your grades, you _____ study a little harder.
A. should
B. can
C. might
D. could
Grammar › View
“He’d help me if he could, ______ he?” Tom asked Jones.
A. didn’t
B. hadn’t
C. couldn’t
D. wouldn’t