It was a long and exhausting trip but I ... to enjoy the drive.
managed
What is the difference between can and might?
...
She ... cook better than anyone I know! (ability)
can
There ... be life on other planets. (pissibility)
could/might
I ... leave soon, it's getting late. (obligation and necessity)
must
Which modal verb is used to indicate an obligation coming from someone else?
Have to
What are the modals of prohibition?
Can't, couldn't, mustn't
You really... to be an expert to make such a statement. (duty and advice)
ought
Name the modal verbs of ability.
Can, could, be able to.
What are the modal verbs of duty and advice?
Should/shouldn't, ought to/oughtn't to
What are related verbs used for permission?
Be allowed to/be permitted to
Required to & obliged to are used for...
Obligation & necessity
You ... worry to much. Take a deep breath, think and make a plan. (no obligation)
needn't
At my previous job we ... make personal calls during worktime. (prohibition)
were forbidden/ weren't allowed/ couldn't