With had the past participle of a verb is used is used not the past form.
swim swam (past) swum (past participle).
I had swum in the race last year.
The past tense verb of "went" with a helping verb is "had gone."
The past tense of "come" with a helping verb is "had come."
The word "ride" in the past tense with a helping verb is "had ridden."
The past tense form of "spent" with a helping verb is "had spent."
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.
It is not a helping verb. It is a be verb, a past tense plural be verb.
The past tense of "think" with a helping verb is "had thought." For example, "I had thought about it before."
The past tense of "wear" with a helping verb is "was/were wearing." For example, "He was wearing a blue shirt."
The simple past tense of swim is "swam". The past participle of swim is "swum".
Did is already a helping verb. It can be used with the past participle of do making 'had done'.
Ate
The past tense with a helping verb of "bring" is "brought." For example, "I brought my lunch to work yesterday."