I would like to have some dinner = present tense.
He would have gone swimming if it had been warmer = past tense.
I could go swimming this afternoon but I'll probably just stay at home = present/future
Could you pass the salt? = present (note: this should say "Please pass the salt"!)
I could have got a degree if I'd gone to university = past tense
With modals, context is vital. Actually, context is vital all the time when talking about grammar.
Note: please ensure you start every new sentence with a capital letter.
"Anyone" is one word and does not take the third person singular form of a verb in the interrogative.
Can anyone help me?
If anyone helps me today, I'll be very grateful.
Did anyone go to the party last night?
If anyone goes to the party tonight, I'll be very surprised.
Student or Learner