I ... speak 2 foreign languages.(ability)
can
He ... call the doctor. (advice)
should (has to)
... I use your phone? (permission)
Can (Could/May)
Children ... play less video games. (advice)
should (ought to)
In my childhood I ... not swim. (ability)
could (was NOT able to)
I ... do my homework. (duty/rule)
must (have TO)
All my friends ... (invite) to my party. (permission)
can be invited
She ... drink at least 2 litres of water a day. (advice)
should (ought to/has to)
He ... not buy lunch because he didn't have any money. (ability)
could (was NOT able To buy)
My friend ... call me when he needs. (permission)
may
We ... to buy bread because we have 2 loaves at home. (advice)
don't need (needn't buy)
In the future I ... speak Chinese fluently. (ability)
will be able to
All children ... study at school. (rule)
must
You ... take my pen if you need. (permission)
can
Please .. I use your laptop? (permission)
can (could)
If you want to pass your test, you ... revise more.(advice,duty)
should (have to,must.need to)
