Yes, gardened is correct.
The past tense is gardened.
yes it is. Note that the word garden can be either a noun or a verb. It is a place where you grow various plants, or it is the work that you do in that place. The present participle, gardening, is more commonly used than the past tense. I like gardening. You could say I gardened yesterday, but more likely you would say I was gardening yesterday.
The past tense is gardened.
Education is a noun. It does not have a tense. However, you can say that someone was educated. That would be the past tense of the verb educate.
All three words, 'Spell past tense' are correctly spelled.
If it has to do with not hearing well, it's "deafened". If it's relating to helping someone with defense, it's "defend" (present tense) or "defended" (past tense).
have in past tense is had
The past tense of have is had.
You spell the past tense of settle like this: Settled
The homophone of "tents" is "tense."
The past tense is benefited.
The past tense is coasted.