Yes, it is. Change is present. Will change is future. Changed is past.
The present tense of "change" is "changes."
To change a verb from present tense to past tense, usually you add "-ed" to the end of the verb. For example, "to have" in present tense becomes "had" in past tense.
He is.
Are.
Change the past tense form of the verb to the present tense. For example. "I ran" becomes "I run"
The sentence starting 'You are sad....' is already in the present tense.
The past tense is 'knew'.
hear, it doesn't change because it is already in present tense. However, if you were talking in past tense, it would become heard.
enjoy
you would say where.
The present perfect tense of want is have/has wanted. Always is an adverb and does not change from one tense to another.
The present tense of "then" is simply "then." "Then" is an adverb that indicates time or sequence and does not change its form based on tense.