Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could chinese you could chinese he could chinese we could chinese you could chinese they could chinese
V-ing form
I could be chinesing you could be chinesing he could be chinesing we could be chinesing you could be chinesing they could be chinesing
Perfect
I could have chinesed you could have chinesed he could have chinesed we could have chinesed you could have chinesed they could have chinesed
V-ing perfect
I could have been chinesing you could have been chinesing he could have been chinesing we could have been chinesing you could have been chinesing they could have been chinesing
Negation
Simple form
I couldn't chinese you couldn't chinese he couldn't chinese we couldn't chinese you couldn't chinese they couldn't chinese
V-ing form
I couldn't be chinesing you couldn't be chinesing he couldn't be chinesing we couldn't be chinesing you couldn't be chinesing they couldn't be chinesing
Perfect
I couldn't have chinesed you couldn't have chinesed he couldn't have chinesed we couldn't have chinesed you couldn't have chinesed they couldn't have chinesed
V-ing perfect
I couldn't have been chinesing you couldn't have been chinesing he couldn't have been chinesing we couldn't have been chinesing you couldn't have been chinesing they couldn't have been chinesing
Interrogative form
Simple form
could I chinese? could you chinese? could he chinese? could we chinese? could you chinese? could they chinese?
V-ing form
could I be chinesing? could you be chinesing? could he be chinesing? could we be chinesing? could you be chinesing? could they be chinesing?
Perfect
could I have chinesed? could you have chinesed? could he have chinesed? could we have chinesed? could you have chinesed? could they have chinesed?
V-ing perfect
could I have been chinesing? could you have been chinesing? could he have been chinesing? could we have been chinesing? could you have been chinesing? could they have been chinesing?
Interro-negative form
Simple form
couldn't I chinese? couldn't you chinese? couldn't he chinese? couldn't we chinese? couldn't you chinese? couldn't they chinese?
V-ing form
couldn't I be chinesing? couldn't you be chinesing? couldn't he be chinesing? couldn't we be chinesing? couldn't you be chinesing? couldn't they be chinesing?
Perfect
couldn't I have chinesed? couldn't you have chinesed? couldn't he have chinesed? couldn't we have chinesed? couldn't you have chinesed? couldn't they have chinesed?
V-ing perfect
couldn't I have been chinesing? couldn't you have been chinesing? couldn't he have been chinesing? couldn't we have been chinesing? couldn't you have been chinesing? couldn't they have been chinesing?