saw
"Saw" is considered past tense for "see." "See" is the present tense form, while "saw" is the past tense form.
The past tense of "see" would be "saw".
Usually, when you see the -ed ending of a word, that means that it IS in past tense. The present tense of aided is to aid.
'Was' is the past tense of the word 'is'.
The word "were" is past tense. It is the past tense of the verb "to be."
'Had visited' is past tense. You can see this because visit is the present tense so visited must be past tense. Also, the word 'had' is often used in the past tense.
saw
It is the past tense.
Ate is the past tense of the word eat. Its a past tense word
Saw is the simple past tense whilst seen is the past participle of the verb "see".
The past tense of see is saw; the past tense of hear is heard.
"received" is the past tense. The present tense of that word is "receive"