[ Past Perfect and Past Perfect Continuous ]
Which of the following is a sentence in “Past Perfect Continuous”?
A. Had you been waiting long before Uber arrived?
B. Have you been waiting long before the Uber arrived?
C. Did you wait the Uber?
D. Are you waiting the Uber to arrive?

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Will & Be going toPassive to ActiveContinuous TensesFrequencyActive & PassivePresent Tense vs Present ContinuousFuture FormsKinds of NounsFamily Vocabulary and GrammarGrammar, Literature, and VocabularyOther quiz:
Subject Verb Agreement › ViewStrawberries and cream __________ my favorite summer dessert.
A. is
B. are
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A chain is only as strong as its ___.
a. links
b. lynx
She is ___ taking care of the pet.
A. must
B. need to
C. have to
D. responsible for
Grammar › View
If I clean up my room now, my parents _____ be mad at me later.
A. didn’t
B. won’t
C. will
D. can
