[ Tenses ]
Multiple Choice: Which sentence correctly uses the past perfect tense?
A. I had finished my homework before my friend called.
B. I finished my homework before my friend calls.
C. I was finishing my homework before my friend calls.

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Adverbial Clause of Cause and EffectGrammar - may & mightInterrogative Pronouns & AdverbsTenses and VerbsIndefinite and Reflexive PronounsZero & First ContidionalNouns FormationPresent Simple & Present Continuous TensesConjunctions, Prepositions and InterjectionsPresent Perfect and Present Perfect Progressive TensesOther quiz:
Subject Verb Agreement › ViewRising levels of carbon dioxide in the atmosphere ______ the growth of trees but ______ trees to die younger.
A. increases, causes
B. increases, cause
C. increase, cause
D. increase, causes
Grammar › View
She walked into the station only to find that the train …………………
A. Leaves
B. Left
C. Had left