If the verb is regular then -ed is added to the end.
For example:
Present tense - I walk to school.
Past tense - I walked to school.
If the verb is irregular then the past tense form will be a new word. The only way to learn them is to remember the new words for each verb.
For example:
Present tense - I bend my knees.
Past tense - I bent my knees.
Studied is not a present tense verb. It is the past tense of study (present tense).
"Has" is the present tense form of the verb "have." The past tense form of "has" is "had."
Have is in present tense. Had is past tense. I have a banana. - present I had a banana. - past
Present tense - you are. Past tense - you were.
"Is" is the present tense form of the verb "to be" and "has" is the present tense form of the verb "to have."
Was is the past tense of the verb to be.
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.
No, "lived" is a past tense verb. The present tense form of "live" is "live."
"You are" is not a verb. "Are" is a verb, but it's present tense, and it can't be used "with past tense" because it's not past tense, it's present tense.
Have is not a "to be" verb. Present tense forms of be: am/is/are Past tense forms of be: was/were Being is the present participle, and been is the past participle.
The word removed is a verb. It is the past tense of remove.
"Enlarges" is a present tense verb. "Enlarged" would be the past tense, and "will enlarge" would be the future tense.