Writer is a noun and has no tense. Write is a present tense verb (writes for the third person singular conjugation).
The present tense of "writer" is "write."
A writer would not use the present tense when describing something which happened some time previously.
True.
It is when a writer switches between tenses. For example, they might begin writing in the present tense but then they switch to writing in the past tense.
'is' is a present tense
The verb is is the present tense.
Present perfect tense.
it's present tense actually
"you do" is present tense. The past tense is "you did" and the future tense is "you will do".
The past tense of did is did. The present tense of did is do. The future tense of did is will do.
The present tense of "will be" is "am/is/are." For example, "I am," "he is," "they are."
has is present tense, had is past tense
No 'is' is present tense. am/is/are = present tense was/were = past tense