I can negotiate you can negotiate he can negotiate we can negotiate you can negotiate they can negotiate
V-ing form
I can be negotiating you can be negotiating he can be negotiating we can be negotiating you can be negotiating they can be negotiating
Perfect
I can have negotiated you can have negotiated he can have negotiated we can have negotiated you can have negotiated they can have negotiated
V-ing perfect
I can have been negotiating you can have been negotiating he can have been negotiating we can have been negotiating you can have been negotiating they can have been negotiating
Negation
Simple form
I can't negotiate you can't negotiate he can't negotiate we can't negotiate you can't negotiate they can't negotiate
V-ing form
I can't be negotiating you can't be negotiating he can't be negotiating we can't be negotiating you can't be negotiating they can't be negotiating
Perfect
I can't have negotiated you can't have negotiated he can't have negotiated we can't have negotiated you can't have negotiated they can't have negotiated
V-ing perfect
I can't have been negotiating you can't have been negotiating he can't have been negotiating we can't have been negotiating you can't have been negotiating they can't have been negotiating
Interrogative form
Simple form
can I negotiate? can you negotiate? can he negotiate? can we negotiate? can you negotiate? can they negotiate?
V-ing form
can I be negotiating? can you be negotiating? can he be negotiating? can we be negotiating? can you be negotiating? can they be negotiating?
Perfect
can I have negotiated? can you have negotiated? can he have negotiated? can we have negotiated? can you have negotiated? can they have negotiated?
V-ing perfect
can I have been negotiating? can you have been negotiating? can he have been negotiating? can we have been negotiating? can you have been negotiating? can they have been negotiating?
Interro-negative form
Simple form
can't I negotiate? can't you negotiate? can't he negotiate? can't we negotiate? can't you negotiate? can't they negotiate?
V-ing form
can't I be negotiating? can't you be negotiating? can't he be negotiating? can't we be negotiating? can't you be negotiating? can't they be negotiating?
Perfect
can't I have negotiated? can't you have negotiated? can't he have negotiated? can't we have negotiated? can't you have negotiated? can't they have negotiated?
V-ing perfect
can't I have been negotiating? can't you have been negotiating? can't he have been negotiating? can't we have been negotiating? can't you have been negotiating? can't they have been negotiating?