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