UNIT 7 - COMPARISONS
UNIT 8 - ADJECTIVES
UNIT 9 - ARTICLES
UNIT 10 - POSSESSIVES AND PRONOUNS
UNIT 11 - ADVERBS OF FREQUENCY
UNIT 12 - ONE(S), ANOTHER, OTHER(S) & THE OTHER(S)
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Grammar: Have to

Have to has 1 meaning: Necessity.

Necessity: something that must be done

Example: I have to go to school.

Notice that in spoken English, we often shorten have to to “hafta” and has to to “hasta.” These forms are used in casual conversation, but never in formal writing.

Notice that there is no contraction for have to.