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