must drizzle
Regular verb: drizzle - drizzled- drizzled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
-
-
it must drizzle
-
-
- 	-
-
it must be drizzling
-
-
- 	-
-
it must have drizzled
-
-
- 	-
-
it must have been drizzling
-
-
- 	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
-
-
it must not drizzle
-
-
- 	-
-
it must not be drizzling
-
-
- 	-
-
it must not have drizzled
-
-
- 	-
-
it must not have been drizzling
-
-
- 	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
-
-
must it drizzle?
-
-
- 	-
-
must it be drizzling?
-
-
- 	-
-
must it have drizzled?
-
-
- 	-
-
must it have been drizzling?
-
-
- 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
-
-
must it not drizzle?
-
-
- 	-
-
must it not be drizzling?
-
-
- 	-
-
must it not have drizzled?
-
-
- 	-
-
must it not have been drizzling?
-
-
-