Unit 12 Don’t eat in class.
練一練1. it’s too late . i ______ leave now.
a. may b. can c. have to d. will
2. mr smith ______ look after his son and daughter because his wife is ill.
a. must b. have to c. has to d. doesn’t have to
3. she has to do her homework first. (否定句)
she _____ ____ _____ do her homework.
四）and you can’t watch tv after school. i can’t, either.
too, also 用于肯定句中，too一般用于句末，also一般用于句中，位于實義動詞前，be動詞和助動詞之后
either 用于否定句，位于句尾
i can speak english, he can speak english, too.
i can speak english, he can also speak english.
i can’t speak english, he can’t, either.