[ Modal Verbs ]
You ___ forget your keys; it’s essential to lock the door.
A. can
B. mustn’t
C. don’t have to
D. should
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Quantifies and Modals of DeductionPrepositions and Phrasal VerbsPassive SentencesSo - Too - Either - NeitherModals and PrepositionOffer and SuggestionConditionals Type IWish SentenceDemonstrative Pronouns and Verb TensesPresent Simple/AffirmativeOther quiz:
Comparative › ViewThe boys are ______ today than they were yesterday.
A. Happy
B. Happier
C. Happiest
Grammar › View
What is the purpose of helping verbs?
A. To show you show the sentence is about.
B. To show an action.
C. To link the main verb to the subject.
D. Nothing.