I might investigate you might investigate he might investigate we might investigate you might investigate they might investigate
V-ing form
I might be investigating you might be investigating he might be investigating we might be investigating you might be investigating they might be investigating
Perfect
I might have investigated you might have investigated he might have investigated we might have investigated you might have investigated they might have investigated
V-ing perfect
I might have been investigating you might have been investigating he might have been investigating we might have been investigating you might have been investigating they might have been investigating
Negation
Simple form
I mightn't investigate you mightn't investigate he mightn't investigate we mightn't investigate you mightn't investigate they mightn't investigate
V-ing form
I mightn't be investigating you mightn't be investigating he mightn't be investigating we mightn't be investigating you mightn't be investigating they mightn't be investigating
Perfect
I mightn't have investigated you mightn't have investigated he mightn't have investigated we mightn't have investigated you mightn't have investigated they mightn't have investigated
V-ing perfect
I mightn't have been investigating you mightn't have been investigating he mightn't have been investigating we mightn't have been investigating you mightn't have been investigating they mightn't have been investigating
Interrogative form
Simple form
might I investigate? might you investigate? might he investigate? might we investigate? might you investigate? might they investigate?
V-ing form
might I be investigating? might you be investigating? might he be investigating? might we be investigating? might you be investigating? might they be investigating?
Perfect
might I have investigated? might you have investigated? might he have investigated? might we have investigated? might you have investigated? might they have investigated?
V-ing perfect
might I have been investigating? might you have been investigating? might he have been investigating? might we have been investigating? might you have been investigating? might they have been investigating?
Interro-negative form
Simple form
mightn't I investigate? mightn't you investigate? mightn't he investigate? mightn't we investigate? mightn't you investigate? mightn't they investigate?
V-ing form
mightn't I be investigating? mightn't you be investigating? mightn't he be investigating? mightn't we be investigating? mightn't you be investigating? mightn't they be investigating?
Perfect
mightn't I have investigated? mightn't you have investigated? mightn't he have investigated? mightn't we have investigated? mightn't you have investigated? mightn't they have investigated?
V-ing perfect
mightn't I have been investigating? mightn't you have been investigating? mightn't he have been investigating? mightn't we have been investigating? mightn't you have been investigating? mightn't they have been investigating?