I can precede you can precede she can precede we can precede you can precede they can precede
V-ing form
I can be preceding you can be preceding she can be preceding we can be preceding you can be preceding they can be preceding
Perfect
I can have preceded you can have preceded she can have preceded we can have preceded you can have preceded they can have preceded
V-ing perfect
I can have been preceding you can have been preceding she can have been preceding we can have been preceding you can have been preceding they can have been preceding
Negation
Simple form
I cannot precede you cannot precede she cannot precede we cannot precede you cannot precede they cannot precede
V-ing form
I cannot be preceding you cannot be preceding she cannot be preceding we cannot be preceding you cannot be preceding they cannot be preceding
Perfect
I cannot have preceded you cannot have preceded she cannot have preceded we cannot have preceded you cannot have preceded they cannot have preceded
V-ing perfect
I cannot have been preceding you cannot have been preceding she cannot have been preceding we cannot have been preceding you cannot have been preceding they cannot have been preceding
Interrogative form
Simple form
can I precede? can you precede? can she precede? can we precede? can you precede? can they precede?
V-ing form
can I be preceding? can you be preceding? can she be preceding? can we be preceding? can you be preceding? can they be preceding?
Perfect
can I have preceded? can you have preceded? can she have preceded? can we have preceded? can you have preceded? can they have preceded?
V-ing perfect
can I have been preceding? can you have been preceding? can she have been preceding? can we have been preceding? can you have been preceding? can they have been preceding?
Interro-negative form
Simple form
can I not precede? can you not precede? can she not precede? can we not precede? can you not precede? can they not precede?
V-ing form
can I not be preceding? can you not be preceding? can she not be preceding? can we not be preceding? can you not be preceding? can they not be preceding?
Perfect
can I not have preceded? can you not have preceded? can she not have preceded? can we not have preceded? can you not have preceded? can they not have preceded?
V-ing perfect
can I not have been preceding? can you not have been preceding? can she not have been preceding? can we not have been preceding? can you not have been preceding? can they not have been preceding?