In which type of sentence is “could” most commonly used?
A. Making a request
B. Asking for permission
C. Making an assertion
D. Offering assistance

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Active & Passive VoiceModals of ProbabilityTenses and Sentence CompletionSimple present/ past/ future tensePresent/Past/Future Continuous TenseConditionals (0 - 1 - 2)Conjunctive Adverbs and PunctuationSimple Compound and Complex SentencesSimple, Compound, Complex SentencesNoun ClauseOther quiz:
Grammar › ViewWhich sentence is written correctly?
A. The librarian needed his computer to check in the books, so when the power went out, they could not do their job.
B. The librarian needed his computer to check in the books,so when the power went out, he could not do their job.
C. The librarian needed his computer to check in the books, so when the power went out, they could not do his job.
D. The librarian needed his computer to check in the books, so when the power went out, he could not do his job.
Contrast Linking Words › View
He failed …………………… his hard work.
A. despite of
B. though
C. in spite of
Grammar › ViewShe always _ (eat) breakfast at 7 AM.
A. eats
B. eat
C. eating
D. eaten
Grammar › View
Choose the correct answer for the gap:
How long ___________ this book?
A. have you used
B. have you been using