English verb conjugation
CAN EXPRESS

Regular verb: express - expressed - expressed

Affirmation

Simple form	V-ing form
I can express you can express he can express we can express you can express they can express	I can be expressing you can be expressing he can be expressing we can be expressing you can be expressing they can be expressing
Perfect	V-ing perfect
I can have expressed you can have expressed he can have expressed we can have expressed you can have expressed they can have expressed	I can have been expressing you can have been expressing he can have been expressing we can have been expressing you can have been expressing they can have been expressing

Negation

Simple form	V-ing form
I can't express you can't express he can't express we can't express you can't express they can't express	I can't be expressing you can't be expressing he can't be expressing we can't be expressing you can't be expressing they can't be expressing
Perfect	V-ing perfect
I can't have expressed you can't have expressed he can't have expressed we can't have expressed you can't have expressed they can't have expressed	I can't have been expressing you can't have been expressing he can't have been expressing we can't have been expressing you can't have been expressing they can't have been expressing

Interrogative form

Simple form	V-ing form
can I express? can you express? can he express? can we express? can you express? can they express?	can I be expressing? can you be expressing? can he be expressing? can we be expressing? can you be expressing? can they be expressing?
Perfect	V-ing perfect
can I have expressed? can you have expressed? can he have expressed? can we have expressed? can you have expressed? can they have expressed?	can I have been expressing? can you have been expressing? can he have been expressing? can we have been expressing? can you have been expressing? can they have been expressing?

Interro-negative form

Simple form	V-ing form
can't I express? can't you express? can't he express? can't we express? can't you express? can't they express?	can't I be expressing? can't you be expressing? can't he be expressing? can't we be expressing? can't you be expressing? can't they be expressing?
Perfect	V-ing perfect
can't I have expressed? can't you have expressed? can't he have expressed? can't we have expressed? can't you have expressed? can't they have expressed?	can't I have been expressing? can't you have been expressing? can't he have been expressing? can't we have been expressing? can't you have been expressing? can't they have been expressing?