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