[ Grammar ]
I don’t know how ____ this machine!
A. use
B. to use
C. using

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Past Simple and Past Continuous TensesPassive of Modal VerbsPreposition and Word FormGrammar ModalsPast ModalsGrammar - FutureConjunction and PunctuationSimple Past Tense (was/were)On, At, ByPassive Voice with ModalsOther quiz:
Modals, Conditionals, and Clauses- Defining, Non-defining › ViewReflecting on past decisions, Emma says, “If they had known about the traffic, they would have left earlier.” Which option best explains the correctness of this sentence?
A. had
B. would have
C. had known
D. would known
Grammar › View
Their house was __________ a castle.
A. biggest than
B. as big as
