An is a preposition and so it doesn't have a past or present tense.
"An" is not a verb, so it does not have a past or present tense. It is an indefinite article used before nouns to indicate a non-specific or unspecified item.
Present tense: are Past tense: were
"received" is the past tense. The present tense of that word is "receive"
"Has" is in present tense. The past tense is "had".
The word "had" is a past tense verb.
The word "were" is past tense. It is the past tense of the verb "to be."
The word "do" is used in both present and past tenses. In present tense, it is used as an auxiliary verb to form questions and negatives (e.g. Do you like coffee? I do not know). In past tense, it can be used as the past tense of "do" (e.g. He did his homework).
"Have" can be used as both a present tense verb (e.g., "I have a book") and a past tense verb (e.g., "I had a book").
"received" is the past tense. The present tense of that word is "receive"
Present tense - am, is and are. Past tense - was and were.
the word "was" is in the past, but the present tense of "was" is are
The past tense of 'present' is presented.
Past tense - was/were Present tense - am/are/is
The word industry doesn't have a past tense or a present tense as it is a noun.
"Know" is present tense. The past tense of "know" is "knew."
"Has" is in present tense. The past tense is "had".
The word "had" is a past tense verb.
"Screams" is a present tense verb (third person singular). The past tense of "scream" is "screamed."