Hello! I have some questions on modal verbs. Firstly I'd like to know whether these sentence contain any mistake connected with modal verbs.
The job interview was a disaster; I
couldwas able to onlyanswer only half the questions.
I heard your sales results were excellent.
MayWill you get a bonus this year?
couldwas able to leave work early yesterday - my boss gave me permission.
Do you know if we must / have to have visas for the Caribbean?
Which is the best alternative?
Thank you in advance!