Today we 'll start learning modal verbs.
What are modal verbs? How are they different from other verbs?Firstly, let's name them: can,could,must,might,may,will,would, shall, should, ought.
- Modal verbs don't express any action, they show how a person refers to the action,which is expressed by the followed verb . The last verb is an infinitive without to
You must finish it by Monday.
- Modal verbs express ability (can,could), obligation (must), probability (should,ought), possibility (can, could,may,might), etc.
- They don't have to- infinitive forms:
- They do not take any suffixes (-s, -ing, -ed)
He can swim well.
- Most modal verbs do not have tenses, they refer to the present or the future .
You should visit a doctor tomorrow. (future)
- We don't use any auxiliary verbs in questions and nagations with modal verbs:
She can't carry her bags herself.
You shouldn't go to bed late!
For the past action we should use the equivalents of modal verbs:
can - could- be able toCan is the only modal verb which has the past form could,
but at the same time we use its equivalent be able to in the past:
He could read when he was six.
He was able to solve this problem.
must - have to
may -to be allowed to