English verb conjugation
COULD OUTDO

Irregular verb: outdo - outdid - outdone

Affirmation

Simple form	V-ing form
I could outdo you could outdo he could outdo we could outdo you could outdo they could outdo	I could be outdoing you could be outdoing he could be outdoing we could be outdoing you could be outdoing they could be outdoing
Perfect	V-ing perfect
I could have outdone you could have outdone he could have outdone we could have outdone you could have outdone they could have outdone	I could have been outdoing you could have been outdoing he could have been outdoing we could have been outdoing you could have been outdoing they could have been outdoing

Negation

Simple form	V-ing form
I couldn't outdo you couldn't outdo he couldn't outdo we couldn't outdo you couldn't outdo they couldn't outdo	I couldn't be outdoing you couldn't be outdoing he couldn't be outdoing we couldn't be outdoing you couldn't be outdoing they couldn't be outdoing
Perfect	V-ing perfect
I couldn't have outdone you couldn't have outdone he couldn't have outdone we couldn't have outdone you couldn't have outdone they couldn't have outdone	I couldn't have been outdoing you couldn't have been outdoing he couldn't have been outdoing we couldn't have been outdoing you couldn't have been outdoing they couldn't have been outdoing

Interrogative form

Simple form	V-ing form
could I outdo? could you outdo? could he outdo? could we outdo? could you outdo? could they outdo?	could I be outdoing? could you be outdoing? could he be outdoing? could we be outdoing? could you be outdoing? could they be outdoing?
Perfect	V-ing perfect
could I have outdone? could you have outdone? could he have outdone? could we have outdone? could you have outdone? could they have outdone?	could I have been outdoing? could you have been outdoing? could he have been outdoing? could we have been outdoing? could you have been outdoing? could they have been outdoing?

Interro-negative form

Simple form	V-ing form
couldn't I outdo? couldn't you outdo? couldn't he outdo? couldn't we outdo? couldn't you outdo? couldn't they outdo?	couldn't I be outdoing? couldn't you be outdoing? couldn't he be outdoing? couldn't we be outdoing? couldn't you be outdoing? couldn't they be outdoing?
Perfect	V-ing perfect
couldn't I have outdone? couldn't you have outdone? couldn't he have outdone? couldn't we have outdone? couldn't you have outdone? couldn't they have outdone?	couldn't I have been outdoing? couldn't you have been outdoing? couldn't he have been outdoing? couldn't we have been outdoing? couldn't you have been outdoing? couldn't they have been outdoing?