concept is a noun. Conceptualize is a verb
Barbara conceptualized herself as a mother, whose first job was to feed her baby.
Could is already the past tense. It is the past tense of the verb "can".
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'.
"Some" is not a verb- the concept of tense does not apply. The past tense of sum is summed, if that is what you meant.
The past tense of the verb "can" (meaning be able) is could.The past tense of the verb "can" (meaning preserve in containers) is canned.
The past tense of the verb 'am' is 'was' or 'were.' The verb 'am' is derived from the verb 'to be.'
The past tense verb for "do" is "did."
I believe the past tense of can would be "could have" but I could be wrong.
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'.
There are not past tense forms of nouns, because there can be no action. However, if the VERB was to answer, then past tense could be answered.
Could is the past form of can. (Sometimes was/were able to is used instead of could.)
I believe it to be true, as you "could" use it as "could have", have being the past tense helping verb.
By is not a verb and does not have a past tense. Buy is a verb, and the past tense is bought.