I believe it to be true, as you "could" use it as "could have", have being the past tense helping verb.
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.
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 already the past tense. It is the past tense of the verb "can".
The past tense of can is could.
You use the past tense form which is 'had'.
Is can be used in the past tense if it's in its past tense form, which is was.
Yes it's the past tense of "can"
"is' is present tense. For past tense use was or were.
Imperious is an adjective and doesn't show tense. You could use it in a past tense sentence eg Her attitude was imperious all week
I believe the past tense of can would be "could have" but I could be wrong.
The present tense of 'is' is 'is'. The past tense of 'is' is 'was'.
The past tense is could.