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.
Yes aided is the past tense of aid.
The word "you are" is used in the present tense. "You were" is used in the past tense.
When "out" is used as a verb the past tense is outed.
The word "do" is used in both present and past tenses. In present tense, it is used as an auxiliary verb to form questions and negatives (e.g. Do you like coffee? I do not know). In past tense, it can be used as the past tense of "do" (e.g. He did his homework).
The past tense is memoed.
Yes, the past tense of need is needed.
The past tense of "after" is "aftered," but it is not commonly used. Instead, the past tense is usually indicated by using the word "after" in combination with a verb in the past tense. For example: "He arrived after the party had ended."
The word "is" is followed by a past tense verb when forming the past continuous tense, such as "He was eating," where "was" is the past tense of "is" and "eating" is the past participle of "eat" used in the continuous form.
Techinically, "exam" is a noun, and does not have a past tense form. If used like "examine", then the past tense would be "examined".
Yes, the past tense of need is needed.
The word "bound" is the most commonly used past tense of "bind".The word binded is used, but is the non-standard form.
The past tense of 'is' is 'was'.
"Hopped" is in the past tense.