English verb conjugation
CAN REJOICE

Regular verb: rejoice - rejoiced - rejoiced

Affirmation

Simple form	V-ing form
I can rejoice you can rejoice he can rejoice we can rejoice you can rejoice they can rejoice	I can be rejoicing you can be rejoicing he can be rejoicing we can be rejoicing you can be rejoicing they can be rejoicing
Perfect	V-ing perfect
I can have rejoiced you can have rejoiced he can have rejoiced we can have rejoiced you can have rejoiced they can have rejoiced	I can have been rejoicing you can have been rejoicing he can have been rejoicing we can have been rejoicing you can have been rejoicing they can have been rejoicing

Negation

Simple form	V-ing form
I cannot rejoice you cannot rejoice he cannot rejoice we cannot rejoice you cannot rejoice they cannot rejoice	I cannot be rejoicing you cannot be rejoicing he cannot be rejoicing we cannot be rejoicing you cannot be rejoicing they cannot be rejoicing
Perfect	V-ing perfect
I cannot have rejoiced you cannot have rejoiced he cannot have rejoiced we cannot have rejoiced you cannot have rejoiced they cannot have rejoiced	I cannot have been rejoicing you cannot have been rejoicing he cannot have been rejoicing we cannot have been rejoicing you cannot have been rejoicing they cannot have been rejoicing

Interrogative form

Simple form	V-ing form
can I rejoice? can you rejoice? can he rejoice? can we rejoice? can you rejoice? can they rejoice?	can I be rejoicing? can you be rejoicing? can he be rejoicing? can we be rejoicing? can you be rejoicing? can they be rejoicing?
Perfect	V-ing perfect
can I have rejoiced? can you have rejoiced? can he have rejoiced? can we have rejoiced? can you have rejoiced? can they have rejoiced?	can I have been rejoicing? can you have been rejoicing? can he have been rejoicing? can we have been rejoicing? can you have been rejoicing? can they have been rejoicing?

Interro-negative form

Simple form	V-ing form
can I not rejoice? can you not rejoice? can he not rejoice? can we not rejoice? can you not rejoice? can they not rejoice?	can I not be rejoicing? can you not be rejoicing? can he not be rejoicing? can we not be rejoicing? can you not be rejoicing? can they not be rejoicing?
Perfect	V-ing perfect
can I not have rejoiced? can you not have rejoiced? can he not have rejoiced? can we not have rejoiced? can you not have rejoiced? can they not have rejoiced?	can I not have been rejoicing? can you not have been rejoicing? can he not have been rejoicing? can we not have been rejoicing? can you not have been rejoicing? can they not have been rejoicing?