English verb conjugation
CAN BOAST

Regular verb: boast - boasted - boasted

Affirmation

Simple form	V-ing form
I can boast you can boast he can boast we can boast you can boast they can boast	I can be boasting you can be boasting he can be boasting we can be boasting you can be boasting they can be boasting
Perfect	V-ing perfect
I can have boasted you can have boasted he can have boasted we can have boasted you can have boasted they can have boasted	I can have been boasting you can have been boasting he can have been boasting we can have been boasting you can have been boasting they can have been boasting

Negation

Simple form	V-ing form
I cannot boast you cannot boast he cannot boast we cannot boast you cannot boast they cannot boast	I cannot be boasting you cannot be boasting he cannot be boasting we cannot be boasting you cannot be boasting they cannot be boasting
Perfect	V-ing perfect
I cannot have boasted you cannot have boasted he cannot have boasted we cannot have boasted you cannot have boasted they cannot have boasted	I cannot have been boasting you cannot have been boasting he cannot have been boasting we cannot have been boasting you cannot have been boasting they cannot have been boasting

Interrogative form

Simple form	V-ing form
can I boast? can you boast? can he boast? can we boast? can you boast? can they boast?	can I be boasting? can you be boasting? can he be boasting? can we be boasting? can you be boasting? can they be boasting?
Perfect	V-ing perfect
can I have boasted? can you have boasted? can he have boasted? can we have boasted? can you have boasted? can they have boasted?	can I have been boasting? can you have been boasting? can he have been boasting? can we have been boasting? can you have been boasting? can they have been boasting?

Interro-negative form

Simple form	V-ing form
can I not boast? can you not boast? can he not boast? can we not boast? can you not boast? can they not boast?	can I not be boasting? can you not be boasting? can he not be boasting? can we not be boasting? can you not be boasting? can they not be boasting?
Perfect	V-ing perfect
can I not have boasted? can you not have boasted? can he not have boasted? can we not have boasted? can you not have boasted? can they not have boasted?	can I not have been boasting? can you not have been boasting? can he not have been boasting? can we not have been boasting? can you not have been boasting? can they not have been boasting?