I could dehydrogenate you could dehydrogenate she could dehydrogenate we could dehydrogenate you could dehydrogenate they could dehydrogenate
V-ing form
I could be dehydrogenating you could be dehydrogenating she could be dehydrogenating we could be dehydrogenating you could be dehydrogenating they could be dehydrogenating
Perfect
I could have dehydrogenated you could have dehydrogenated she could have dehydrogenated we could have dehydrogenated you could have dehydrogenated they could have dehydrogenated
V-ing perfect
I could have been dehydrogenating you could have been dehydrogenating she could have been dehydrogenating we could have been dehydrogenating you could have been dehydrogenating they could have been dehydrogenating
Negation
Simple form
I couldn't dehydrogenate you couldn't dehydrogenate she couldn't dehydrogenate we couldn't dehydrogenate you couldn't dehydrogenate they couldn't dehydrogenate
V-ing form
I couldn't be dehydrogenating you couldn't be dehydrogenating she couldn't be dehydrogenating we couldn't be dehydrogenating you couldn't be dehydrogenating they couldn't be dehydrogenating
Perfect
I couldn't have dehydrogenated you couldn't have dehydrogenated she couldn't have dehydrogenated we couldn't have dehydrogenated you couldn't have dehydrogenated they couldn't have dehydrogenated
V-ing perfect
I couldn't have been dehydrogenating you couldn't have been dehydrogenating she couldn't have been dehydrogenating we couldn't have been dehydrogenating you couldn't have been dehydrogenating they couldn't have been dehydrogenating
Interrogative form
Simple form
could I dehydrogenate? could you dehydrogenate? could she dehydrogenate? could we dehydrogenate? could you dehydrogenate? could they dehydrogenate?
V-ing form
could I be dehydrogenating? could you be dehydrogenating? could she be dehydrogenating? could we be dehydrogenating? could you be dehydrogenating? could they be dehydrogenating?
Perfect
could I have dehydrogenated? could you have dehydrogenated? could she have dehydrogenated? could we have dehydrogenated? could you have dehydrogenated? could they have dehydrogenated?
V-ing perfect
could I have been dehydrogenating? could you have been dehydrogenating? could she have been dehydrogenating? could we have been dehydrogenating? could you have been dehydrogenating? could they have been dehydrogenating?
Interro-negative form
Simple form
couldn't I dehydrogenate? couldn't you dehydrogenate? couldn't she dehydrogenate? couldn't we dehydrogenate? couldn't you dehydrogenate? couldn't they dehydrogenate?
V-ing form
couldn't I be dehydrogenating? couldn't you be dehydrogenating? couldn't she be dehydrogenating? couldn't we be dehydrogenating? couldn't you be dehydrogenating? couldn't they be dehydrogenating?
Perfect
couldn't I have dehydrogenated? couldn't you have dehydrogenated? couldn't she have dehydrogenated? couldn't we have dehydrogenated? couldn't you have dehydrogenated? couldn't they have dehydrogenated?
V-ing perfect
couldn't I have been dehydrogenating? couldn't you have been dehydrogenating? couldn't she have been dehydrogenating? couldn't we have been dehydrogenating? couldn't you have been dehydrogenating? couldn't they have been dehydrogenating?