I could embed you could embed he could embed we could embed you could embed they could embed
V-ing form
I could be embedding you could be embedding he could be embedding we could be embedding you could be embedding they could be embedding
Perfect
I could have embedded you could have embedded he could have embedded we could have embedded you could have embedded they could have embedded
V-ing perfect
I could have been embedding you could have been embedding he could have been embedding we could have been embedding you could have been embedding they could have been embedding
Negation
Simple form
I couldn't embed you couldn't embed he couldn't embed we couldn't embed you couldn't embed they couldn't embed
V-ing form
I couldn't be embedding you couldn't be embedding he couldn't be embedding we couldn't be embedding you couldn't be embedding they couldn't be embedding
Perfect
I couldn't have embedded you couldn't have embedded he couldn't have embedded we couldn't have embedded you couldn't have embedded they couldn't have embedded
V-ing perfect
I couldn't have been embedding you couldn't have been embedding he couldn't have been embedding we couldn't have been embedding you couldn't have been embedding they couldn't have been embedding
Interrogative form
Simple form
could I embed? could you embed? could he embed? could we embed? could you embed? could they embed?
V-ing form
could I be embedding? could you be embedding? could he be embedding? could we be embedding? could you be embedding? could they be embedding?
Perfect
could I have embedded? could you have embedded? could he have embedded? could we have embedded? could you have embedded? could they have embedded?
V-ing perfect
could I have been embedding? could you have been embedding? could he have been embedding? could we have been embedding? could you have been embedding? could they have been embedding?
Interro-negative form
Simple form
couldn't I embed? couldn't you embed? couldn't he embed? couldn't we embed? couldn't you embed? couldn't they embed?
V-ing form
couldn't I be embedding? couldn't you be embedding? couldn't he be embedding? couldn't we be embedding? couldn't you be embedding? couldn't they be embedding?
Perfect
couldn't I have embedded? couldn't you have embedded? couldn't he have embedded? couldn't we have embedded? couldn't you have embedded? couldn't they have embedded?
V-ing perfect
couldn't I have been embedding? couldn't you have been embedding? couldn't he have been embedding? couldn't we have been embedding? couldn't you have been embedding? couldn't they have been embedding?