Choose the correct options. Sometimes more than one option is possible
1 Modal verbs can refer to
present;
past:
future;
all stated above.
2 If followed by a bare infinitive, modal verbs refer to
a complete action or state
an uncompleted action or state
3 If followed by a perfect infinitive, modal verbs refer to
a complete action or state
an uncompleted action or state
4 Choose a true sentence
All modal verbs don't take any endings.
Some modal verbs need endings.
5 In interrogative sentences
All modal verbs don't take any endings.
Some modal verbs need endings.
6 In negations
most modal verbs are followed by not
not is added to the auxiliary verbs in some cases
not goes before the subject.
