Modal Verb Could
The modal verb ‘could’ expresses ‘polite request’, ‘ability in past’,
and ‘possibility’.We also use it to denote ’suggestion’ and
‘permission’.It is one of the most useful words/verbs that we
notice people use in their day today conversation.It is really
very useful verb, every learner must master its use.
Before we learn how to frame sentences with ‘could’,we should
study the following [...]

