I got back at 5:00pm. This is a past simple sentence.
To make it negative add did not or didn't. The verb didn't shows it is the past so the main verbs remains in the basic form.
I did not get back until 5:00pm
The past tense is came back.
The past tense is backed.
The simple past tense is "gave back"
No. If it is being used as a verb, "back" is the present tense. The past tense would be backed.
The past tense of 'to back' is 'backed'.
Got back.
I got back
went back
To change the past tense and past participle of a verb, you must either change the verb back to its present tense or get rid of its suffix.
called back.Call back is a phrasal verb. When changing to past only the form of the verb call changes. The adverb back remians the same.
backed.
the past tense of am is was and the past tense of has is had