Topics: Present Perfect, Present Simple, Present Continuous
A: Why _________ ? (smile) B: Because I’m happy.
A. do you smile
B. are you smiling
C. are you not smiling
D. don’t you smile
Select your answer:

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Gerund vs. Infinitive › View
A rolling stone gathers no moss.
A. Verb
B. Participle
C. Gerund
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I’m coming tomorrow.
A. simple present
B. simple past
C. present perfect
D. present continuous
