Topics: Perfect Progressive Tenses
I ______ (read) this book for three hours by the time you arrive.
A. am reading
B. have been reading
C. will have been reading
Select your answer:

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Adjective Clause and Adverb ClausePresent Progressive or Present SimpleSimple Present and Present Continuous TenseAdjectives, ING - EDPresent PerfectPrepositions of Location, Movement and TimeAdverbial Clauses of Reason / CauseThe -ing Form of VerbsFrequencySentence Fragments and Complete SentencesOther quiz:
Grammar › ViewWhich sentence is correct?
A. The concrete mixture must be stirred thoroughly.
B. The concrete mixture must be stir thoroughly.
C. The concrete mixture must be stirring thoroughly.
D. The concrete mixture must stirring thoroughly.
Grammar › View
I hate to say good ______ to my puppy.
A. buy
B. bye
C. by
D. dry