I could elongate you could elongate he could elongate we could elongate you could elongate they could elongate
V-ing form
I could be elongating you could be elongating he could be elongating we could be elongating you could be elongating they could be elongating
Perfect
I could have elongated you could have elongated he could have elongated we could have elongated you could have elongated they could have elongated
V-ing perfect
I could have been elongating you could have been elongating he could have been elongating we could have been elongating you could have been elongating they could have been elongating
Negation
Simple form
I could not elongate you could not elongate he could not elongate we could not elongate you could not elongate they could not elongate
V-ing form
I could not be elongating you could not be elongating he could not be elongating we could not be elongating you could not be elongating they could not be elongating
Perfect
I could not have elongated you could not have elongated he could not have elongated we could not have elongated you could not have elongated they could not have elongated
V-ing perfect
I could not have been elongating you could not have been elongating he could not have been elongating we could not have been elongating you could not have been elongating they could not have been elongating
Interrogative form
Simple form
could I elongate? could you elongate? could he elongate? could we elongate? could you elongate? could they elongate?
V-ing form
could I be elongating? could you be elongating? could he be elongating? could we be elongating? could you be elongating? could they be elongating?
Perfect
could I have elongated? could you have elongated? could he have elongated? could we have elongated? could you have elongated? could they have elongated?
V-ing perfect
could I have been elongating? could you have been elongating? could he have been elongating? could we have been elongating? could you have been elongating? could they have been elongating?
Interro-negative form
Simple form
could I not elongate? could you not elongate? could he not elongate? could we not elongate? could you not elongate? could they not elongate?
V-ing form
could I not be elongating? could you not be elongating? could he not be elongating? could we not be elongating? could you not be elongating? could they not be elongating?
Perfect
could I not have elongated? could you not have elongated? could he not have elongated? could we not have elongated? could you not have elongated? could they not have elongated?
V-ing perfect
could I not have been elongating? could you not have been elongating? could he not have been elongating? could we not have been elongating? could you not have been elongating? could they not have been elongating?