visitamos...is it present or past?

Question

in a sentence ,how can i distinguish that it is presnt tense or past tense? because it is same in both tense

Answer 1

It is the form for both present indicative and preterite, for the first person plural (nosotros). Context must clarify which is intended, just as in English when we say, "We hit the ball." That could be past or present, and context must clarify.

Answer 2

hit (present) hit (past)
cut (present) cut (past)
let (present) let (past)
put (present) put (past)
quit (present) quit (past)
set (present) set (past)

Besides, regardless of what you call the tenses, present tense can be used for past, present of future.

Answer 3

in a sentence ,how can i distinguish that it is presnt tense or past tense? because it is same in both tense

That would depend on the context in which it is used. To indicate tense, one normally uses time indicators like 'ayer' or 'hoy' or 'manana', and can also be deduced from other past tenses that may be used within the sentence, such as:

"Visitamos el Louvre y vimos su cuadro mas famoso, la Mona Lisa."