particular situations:
• We
couldn't / weren't allowed to
open the presents until Christmas.
If we use the present perfect, past perfect or an infinitive, we use
be allowed to,
not
• They
have been
allowed to
keep the Roman coins they found in their garden.
• She is unlikely
to be
allowed to
travel on that airline again.
When we OFFER to do something, or offer by making a suggestion, we can use
can
or
could:
• Can/Could I
help you with your bags? • You
can/could
borrow my car if you want.
In offers that are questions we can also use
shall or should:
• Shall/Should
I phone for a taxi for you?
If we use
could or should
we sound less certain that the offer will be accepted.
We also use
shall/should
in questions that request confirmation or advice:
•
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