I can trickle you can trickle he can trickle we can trickle you can trickle they can trickle
V-ing form
I can be trickling you can be trickling he can be trickling we can be trickling you can be trickling they can be trickling
Perfect
I can have trickled you can have trickled he can have trickled we can have trickled you can have trickled they can have trickled
V-ing perfect
I can have been trickling you can have been trickling he can have been trickling we can have been trickling you can have been trickling they can have been trickling
Negation
Simple form
I can't trickle you can't trickle he can't trickle we can't trickle you can't trickle they can't trickle
V-ing form
I can't be trickling you can't be trickling he can't be trickling we can't be trickling you can't be trickling they can't be trickling
Perfect
I can't have trickled you can't have trickled he can't have trickled we can't have trickled you can't have trickled they can't have trickled
V-ing perfect
I can't have been trickling you can't have been trickling he can't have been trickling we can't have been trickling you can't have been trickling they can't have been trickling
Interrogative form
Simple form
can I trickle? can you trickle? can he trickle? can we trickle? can you trickle? can they trickle?
V-ing form
can I be trickling? can you be trickling? can he be trickling? can we be trickling? can you be trickling? can they be trickling?
Perfect
can I have trickled? can you have trickled? can he have trickled? can we have trickled? can you have trickled? can they have trickled?
V-ing perfect
can I have been trickling? can you have been trickling? can he have been trickling? can we have been trickling? can you have been trickling? can they have been trickling?
Interro-negative form
Simple form
can't I trickle? can't you trickle? can't he trickle? can't we trickle? can't you trickle? can't they trickle?
V-ing form
can't I be trickling? can't you be trickling? can't he be trickling? can't we be trickling? can't you be trickling? can't they be trickling?
Perfect
can't I have trickled? can't you have trickled? can't he have trickled? can't we have trickled? can't you have trickled? can't they have trickled?
V-ing perfect
can't I have been trickling? can't you have been trickling? can't he have been trickling? can't we have been trickling? can't you have been trickling? can't they have been trickling?