[ Tenses ]
They ___ (to study) for two hours.
A. study
B. have been studying
C. studies
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Modal ProbabilityGrammar and Verb TensesPresent, Past, and Future TimeModals and Modal PerfectsPresent Perfect Tense and Simple Past TenseGrammar - must & have toAdjective ClauseGrammar PhrasesPassive Voice Active VoiceConditional and Mix Conditional SentenceOther quiz:
Past Tense › ViewArif ________ his son from the school just now.
A. collect
B. collecting
C. collected
Grammar › View
It’s __________ to stay up too late.
A. unhealthy
B. to
C. to exciting
D. not
TOEFL Grammar › ViewWe have only another five minutes. I think we _____.
A. hurry
B. be hurry
C. to hurry
D. should hurry
Grammar & Vocabulary › View
The weather was cold and __.
A. damp
B. wet
C. rainy