People celebrate New Year.

People celebrate New Year. - Pr.S.
People don't celebrate New Year. - Pr.S.
Do people celebrate New Year? - Pr.S.

People celebrated New Year. - P.S.
People didn't celebrate New Year. - P.S.
Did people celebrate New Year? - P.S.

People will celebrate New Year. - F.S.
People will not celebrate New Year. - F.S.
Will people celebrate New Year? - F.S.

People are celebrating New Year. - Pr.C.
People are not celebrating New Year. - Pr.C.
Are people celebrating New Year? - Pr.C.

People were celebrating New Year. - P.C.
People were not celebrating New Year. - P.C.
Were people celebrating New Year? - P.C.

People have celebrated New Year. - Pr.P.
People have not celebrated New Year. - Pr.P.
Have people celebrated New Year? - Pr.P.

People had celebrated New Year. - P.P.
People had not celebrated New Year. - P.P.
Had people celebrated New Year. - P.P.

If people celebrate New Year, you will celebrate it too. - Cond. 1

If people don't celebrated New Year, they would be bored. - Cond. 2

If people had not celebrated New Year, they would have known traditions. - Cond. 3

If people celebrate New Year, they know how to celebrate it. - Cond. 0