Fill in the necessary modal verbs can\ can`t , may\may not , must\mustn`t , to have to in the correct form 1) you swim well ? - oh ,no. swim very well .2) ben ,you polite with your sister ! 3) i come in ? -no, are late. 4)boys ,you in class. 5) helen hard , because she wants to pass her exam.
2)must или should
3)may. may not
4) must not
5) should