I believe it to be true, as you "could" use it as "could have", have being the past tense helping verb.
you could use it in the future tense e.g i will be getting a hamster on saturday. for the past tense you would use been. for the present you could use something like doing
Could is past tense. It is the past of can. In reported speech you could use could be to mean past.I asked him if he could be a bit quieter.
The past tense of can is could.
Could is already the past tense. It is the past tense of the verb "can".
The past tense of "can" is "could."
It is could.
Yes, "could" is the past tense of "can." It is used to indicate past ability or past possibility.
Yes, "could" is the past tense of "can." For example, "I can swim" changes to "I could swim" in the past tense.
The past tense of the verb 'can' (meaning able to) is could.The past tense of the verb 'can' (meaning put in a container) is canned.Note: The verb 'could' also means 'future possibility'.
You use the past tense form which is 'had'.
I believe the past tense of can would be "could have" but I could be wrong.
Can is an auxiliary verb it has a past -- could -- but doesn't have a past participle.