Present: (S) go to the theature.
(C) am/are/is going to the theature.
(P) have/has gone to the theature.
Past: (S) went to the theature
(C) was/were going to the theature.
(P) had gone to the theature.
Future: (S) will/shall go to the theature.
(C) will going to the theature.
(P) will have gone to the theature.
S - simple.
C - Continous.
P - perfect.