It will sometimes change with different styles of writing... but generally:
Past: Should have (followed by a past participle)
Present: Should
Future: Should
Note that in older novels, the past tense is sometimes the same as the present.
Should as in I should have done that
Shall.
The present tense form of the word "have" is "have".
The word "plays" is in present tense.
the word "was" is in the past, but the present tense of "was" is are
"Is" is present tense, while "was" is past tense.
"Has" is in present tense. The past tense is "had".
The word 'ask' is in the present tense.
"received" is the past tense. The present tense of that word is "receive"
present tense
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).
The simple present tense is do.
The simple present tense is do.