I can decompose you can decompose he can decompose we can decompose you can decompose they can decompose
V-ing form
I can be decomposing you can be decomposing he can be decomposing we can be decomposing you can be decomposing they can be decomposing
Perfect
I can have decomposed you can have decomposed he can have decomposed we can have decomposed you can have decomposed they can have decomposed
V-ing perfect
I can have been decomposing you can have been decomposing he can have been decomposing we can have been decomposing you can have been decomposing they can have been decomposing
Negation
Simple form
I cannot decompose you cannot decompose he cannot decompose we cannot decompose you cannot decompose they cannot decompose
V-ing form
I cannot be decomposing you cannot be decomposing he cannot be decomposing we cannot be decomposing you cannot be decomposing they cannot be decomposing
Perfect
I cannot have decomposed you cannot have decomposed he cannot have decomposed we cannot have decomposed you cannot have decomposed they cannot have decomposed
V-ing perfect
I cannot have been decomposing you cannot have been decomposing he cannot have been decomposing we cannot have been decomposing you cannot have been decomposing they cannot have been decomposing
Interrogative form
Simple form
can I decompose? can you decompose? can he decompose? can we decompose? can you decompose? can they decompose?
V-ing form
can I be decomposing? can you be decomposing? can he be decomposing? can we be decomposing? can you be decomposing? can they be decomposing?
Perfect
can I have decomposed? can you have decomposed? can he have decomposed? can we have decomposed? can you have decomposed? can they have decomposed?
V-ing perfect
can I have been decomposing? can you have been decomposing? can he have been decomposing? can we have been decomposing? can you have been decomposing? can they have been decomposing?
Interro-negative form
Simple form
can I not decompose? can you not decompose? can he not decompose? can we not decompose? can you not decompose? can they not decompose?
V-ing form
can I not be decomposing? can you not be decomposing? can he not be decomposing? can we not be decomposing? can you not be decomposing? can they not be decomposing?
Perfect
can I not have decomposed? can you not have decomposed? can he not have decomposed? can we not have decomposed? can you not have decomposed? can they not have decomposed?
V-ing perfect
can I not have been decomposing? can you not have been decomposing? can he not have been decomposing? can we not have been decomposing? can you not have been decomposing? can they not have been decomposing?