English verb conjugation
COULD ATTENUATE

Regular verb: attenuate - attenuated - attenuated

Affirmation

Simple form	V-ing form
I could attenuate you could attenuate she could attenuate we could attenuate you could attenuate they could attenuate	I could be attenuating you could be attenuating she could be attenuating we could be attenuating you could be attenuating they could be attenuating
Perfect	V-ing perfect
I could have attenuated you could have attenuated she could have attenuated we could have attenuated you could have attenuated they could have attenuated	I could have been attenuating you could have been attenuating she could have been attenuating we could have been attenuating you could have been attenuating they could have been attenuating

Negation

Simple form	V-ing form
I couldn't attenuate you couldn't attenuate she couldn't attenuate we couldn't attenuate you couldn't attenuate they couldn't attenuate	I couldn't be attenuating you couldn't be attenuating she couldn't be attenuating we couldn't be attenuating you couldn't be attenuating they couldn't be attenuating
Perfect	V-ing perfect
I couldn't have attenuated you couldn't have attenuated she couldn't have attenuated we couldn't have attenuated you couldn't have attenuated they couldn't have attenuated	I couldn't have been attenuating you couldn't have been attenuating she couldn't have been attenuating we couldn't have been attenuating you couldn't have been attenuating they couldn't have been attenuating

Interrogative form

Simple form	V-ing form
could I attenuate? could you attenuate? could she attenuate? could we attenuate? could you attenuate? could they attenuate?	could I be attenuating? could you be attenuating? could she be attenuating? could we be attenuating? could you be attenuating? could they be attenuating?
Perfect	V-ing perfect
could I have attenuated? could you have attenuated? could she have attenuated? could we have attenuated? could you have attenuated? could they have attenuated?	could I have been attenuating? could you have been attenuating? could she have been attenuating? could we have been attenuating? could you have been attenuating? could they have been attenuating?

Interro-negative form

Simple form	V-ing form
couldn't I attenuate? couldn't you attenuate? couldn't she attenuate? couldn't we attenuate? couldn't you attenuate? couldn't they attenuate?	couldn't I be attenuating? couldn't you be attenuating? couldn't she be attenuating? couldn't we be attenuating? couldn't you be attenuating? couldn't they be attenuating?
Perfect	V-ing perfect
couldn't I have attenuated? couldn't you have attenuated? couldn't she have attenuated? couldn't we have attenuated? couldn't you have attenuated? couldn't they have attenuated?	couldn't I have been attenuating? couldn't you have been attenuating? couldn't she have been attenuating? couldn't we have been attenuating? couldn't you have been attenuating? couldn't they have been attenuating?