'Am' is the first person singular present tense conjugation of the verb 'to be'. The past tense conjugation of the first person singular is 'was'. and the past participle form is 'have been'.
Examples of all three tenses in the first person singular follow.
The past tenses of "lonely" are "lonelied" and "lonely" itself.
had.
The past tenses of "bring" are "brought" for the simple past and "had brought" for the past perfect.
The two past tenses for "teach" are "taught" and "teached."
Past tense is act or action done in the past.The past tenses include the simple past, past perfect, past continuous, and past perfect continuous.
"Nervous" is an adjective, it doesn't have a past tense. It is only verbs that have a past tense.
Present - am, is, are. Past - was, were.
The past tense is went.
"had not" is the past tense of "have not". (not is an adverb and does not have tenses)
The three standard tenses are forget, forgot, forgotten.
Yes, they are the basic tenses.
There are three simple tenses - past, present and future.