English verb conjugation
COULD MODEM

Regular verb: modem - modemed - modemed

Affirmation

Simple form	V-ing form
I could modem you could modem he could modem we could modem you could modem they could modem	I could be modeming you could be modeming he could be modeming we could be modeming you could be modeming they could be modeming
Perfect	V-ing perfect
I could have modemed you could have modemed he could have modemed we could have modemed you could have modemed they could have modemed	I could have been modeming you could have been modeming he could have been modeming we could have been modeming you could have been modeming they could have been modeming

Negation

Simple form	V-ing form
I couldn't modem you couldn't modem he couldn't modem we couldn't modem you couldn't modem they couldn't modem	I couldn't be modeming you couldn't be modeming he couldn't be modeming we couldn't be modeming you couldn't be modeming they couldn't be modeming
Perfect	V-ing perfect
I couldn't have modemed you couldn't have modemed he couldn't have modemed we couldn't have modemed you couldn't have modemed they couldn't have modemed	I couldn't have been modeming you couldn't have been modeming he couldn't have been modeming we couldn't have been modeming you couldn't have been modeming they couldn't have been modeming

Interrogative form

Simple form	V-ing form
could I modem? could you modem? could he modem? could we modem? could you modem? could they modem?	could I be modeming? could you be modeming? could he be modeming? could we be modeming? could you be modeming? could they be modeming?
Perfect	V-ing perfect
could I have modemed? could you have modemed? could he have modemed? could we have modemed? could you have modemed? could they have modemed?	could I have been modeming? could you have been modeming? could he have been modeming? could we have been modeming? could you have been modeming? could they have been modeming?

Interro-negative form

Simple form	V-ing form
couldn't I modem? couldn't you modem? couldn't he modem? couldn't we modem? couldn't you modem? couldn't they modem?	couldn't I be modeming? couldn't you be modeming? couldn't he be modeming? couldn't we be modeming? couldn't you be modeming? couldn't they be modeming?
Perfect	V-ing perfect
couldn't I have modemed? couldn't you have modemed? couldn't he have modemed? couldn't we have modemed? couldn't you have modemed? couldn't they have modemed?	couldn't I have been modeming? couldn't you have been modeming? couldn't he have been modeming? couldn't we have been modeming? couldn't you have been modeming? couldn't they have been modeming?