Decisive is not a verb so it does not have a past tense form.
Decisive is an adjective
Was decisive; decided
The past tense of "to occur" is occurred.
Tired is an adjective it doesn't have a past tense.
Enthusiasm is a noun and doesn't have a past tense. Only verbs have a past tense.
Some examples: Past tense - worked. Future tense - will work. Past tense - played. Future tense - will play. Past tense - lied. Future tense - will lie.
Lost is the past tense of lose.
the past tense of am is was and the past tense of has is had
The past tense of get is got. For isn't a verb and so doesn't have a past tense. The past tense of has is had. Had is already the past tense. The past tense of have is had.
Was and were are both the past tense of be. The present tense is: I am he is you are they are The past tense is: I was he was you were they were
The past tense of "will" is "would" and the past tense of "be" is "was" or "were" depending on the subject (singular or plural).
was is the past tense of am eg. 'I am' (now) but 'I was' (is past)
Wrote is past tense. It is the past tense of write.Wrote is already a past tense.
The past tense of "finish" is "finished". The past tense of "be" is "was" (singular) or "were" (plural).
The past tense of can is could.
The past tense is schooled. The past continuous tense is 'was/were schooling'.
The three kinds of past tense are simple past, past continuous, and past perfect. Simple past is used to describe a completed action at a specific time, past continuous describes an action that was ongoing in the past, and past perfect is used to show that one action in the past happened before another.
The past tense of "exist" is "existed." The past perfect tense is "had existed."
The past tense of "flow" is "flowed."