I can throttle you can throttle he can throttle we can throttle you can throttle they can throttle
V-ing form
I can be throttling you can be throttling he can be throttling we can be throttling you can be throttling they can be throttling
Perfect
I can have throttled you can have throttled he can have throttled we can have throttled you can have throttled they can have throttled
V-ing perfect
I can have been throttling you can have been throttling he can have been throttling we can have been throttling you can have been throttling they can have been throttling
Negation
Simple form
I cannot throttle you cannot throttle he cannot throttle we cannot throttle you cannot throttle they cannot throttle
V-ing form
I cannot be throttling you cannot be throttling he cannot be throttling we cannot be throttling you cannot be throttling they cannot be throttling
Perfect
I cannot have throttled you cannot have throttled he cannot have throttled we cannot have throttled you cannot have throttled they cannot have throttled
V-ing perfect
I cannot have been throttling you cannot have been throttling he cannot have been throttling we cannot have been throttling you cannot have been throttling they cannot have been throttling
Interrogative form
Simple form
can I throttle? can you throttle? can he throttle? can we throttle? can you throttle? can they throttle?
V-ing form
can I be throttling? can you be throttling? can he be throttling? can we be throttling? can you be throttling? can they be throttling?
Perfect
can I have throttled? can you have throttled? can he have throttled? can we have throttled? can you have throttled? can they have throttled?
V-ing perfect
can I have been throttling? can you have been throttling? can he have been throttling? can we have been throttling? can you have been throttling? can they have been throttling?
Interro-negative form
Simple form
can I not throttle? can you not throttle? can he not throttle? can we not throttle? can you not throttle? can they not throttle?
V-ing form
can I not be throttling? can you not be throttling? can he not be throttling? can we not be throttling? can you not be throttling? can they not be throttling?
Perfect
can I not have throttled? can you not have throttled? can he not have throttled? can we not have throttled? can you not have throttled? can they not have throttled?
V-ing perfect
can I not have been throttling? can you not have been throttling? can he not have been throttling? can we not have been throttling? can you not have been throttling? can they not have been throttling?