Present - I mean, She means. Future - I will mean, She will mean. Past - Meant.
The three basic word tenses are past, present, and future.
Past tense - was and were. Present tense - am, are and is.
tenses
Past tense - had. Present tense - have/has. Future tense - will have.
Imperfect: Passed Present: Pass/ Is passing Future: Will pass
Legion is a noun. it does not have a tense
The word nice is an adjective and so doesn't have any tenses. It is only verbs that have tenses.
A verb is also known as an action word, and there are past, present, and future tenses.
Surveillance is a noun and so doesn't have any tenses. Only verbs have tenses. *Added by T.Sampson - The person posing the question is likely asking for the past tense of 'surveill', which would be 'surveilled', and present tense which is 'surveilling'....
Is, are and am.
No, the word "explain" is not present tense. "Explain" is the base form of the verb, and it can be used in various tenses like present ("I explain"), past ("I explained"), or future ("I will explain").
This form of the verb can be used in more tenses: present participle, present continuous, past continuous, past perfect continuous, future perfect continuous, future continuous, present perfect continuous.