I could crochet you could crochet she could crochet we could crochet you could crochet they could crochet
V-ing form
I could be crocheting you could be crocheting she could be crocheting we could be crocheting you could be crocheting they could be crocheting
Perfect
I could have crocheted you could have crocheted she could have crocheted we could have crocheted you could have crocheted they could have crocheted
V-ing perfect
I could have been crocheting you could have been crocheting she could have been crocheting we could have been crocheting you could have been crocheting they could have been crocheting
Negation
Simple form
I couldn't crochet you couldn't crochet she couldn't crochet we couldn't crochet you couldn't crochet they couldn't crochet
V-ing form
I couldn't be crocheting you couldn't be crocheting she couldn't be crocheting we couldn't be crocheting you couldn't be crocheting they couldn't be crocheting
Perfect
I couldn't have crocheted you couldn't have crocheted she couldn't have crocheted we couldn't have crocheted you couldn't have crocheted they couldn't have crocheted
V-ing perfect
I couldn't have been crocheting you couldn't have been crocheting she couldn't have been crocheting we couldn't have been crocheting you couldn't have been crocheting they couldn't have been crocheting
Interrogative form
Simple form
could I crochet? could you crochet? could she crochet? could we crochet? could you crochet? could they crochet?
V-ing form
could I be crocheting? could you be crocheting? could she be crocheting? could we be crocheting? could you be crocheting? could they be crocheting?
Perfect
could I have crocheted? could you have crocheted? could she have crocheted? could we have crocheted? could you have crocheted? could they have crocheted?
V-ing perfect
could I have been crocheting? could you have been crocheting? could she have been crocheting? could we have been crocheting? could you have been crocheting? could they have been crocheting?
Interro-negative form
Simple form
couldn't I crochet? couldn't you crochet? couldn't she crochet? couldn't we crochet? couldn't you crochet? couldn't they crochet?
V-ing form
couldn't I be crocheting? couldn't you be crocheting? couldn't she be crocheting? couldn't we be crocheting? couldn't you be crocheting? couldn't they be crocheting?
Perfect
couldn't I have crocheted? couldn't you have crocheted? couldn't she have crocheted? couldn't we have crocheted? couldn't you have crocheted? couldn't they have crocheted?
V-ing perfect
couldn't I have been crocheting? couldn't you have been crocheting? couldn't she have been crocheting? couldn't we have been crocheting? couldn't you have been crocheting? couldn't they have been crocheting?