English verb conjugation
COULD NOTICE

Regular verb: notice - noticed - noticed

Affirmation

Simple form	V-ing form
I could notice you could notice he could notice we could notice you could notice they could notice	I could be noticing you could be noticing he could be noticing we could be noticing you could be noticing they could be noticing
Perfect	V-ing perfect
I could have noticed you could have noticed he could have noticed we could have noticed you could have noticed they could have noticed	I could have been noticing you could have been noticing he could have been noticing we could have been noticing you could have been noticing they could have been noticing

Negation

Simple form	V-ing form
I couldn't notice you couldn't notice he couldn't notice we couldn't notice you couldn't notice they couldn't notice	I couldn't be noticing you couldn't be noticing he couldn't be noticing we couldn't be noticing you couldn't be noticing they couldn't be noticing
Perfect	V-ing perfect
I couldn't have noticed you couldn't have noticed he couldn't have noticed we couldn't have noticed you couldn't have noticed they couldn't have noticed	I couldn't have been noticing you couldn't have been noticing he couldn't have been noticing we couldn't have been noticing you couldn't have been noticing they couldn't have been noticing

Interrogative form

Simple form	V-ing form
could I notice? could you notice? could he notice? could we notice? could you notice? could they notice?	could I be noticing? could you be noticing? could he be noticing? could we be noticing? could you be noticing? could they be noticing?
Perfect	V-ing perfect
could I have noticed? could you have noticed? could he have noticed? could we have noticed? could you have noticed? could they have noticed?	could I have been noticing? could you have been noticing? could he have been noticing? could we have been noticing? could you have been noticing? could they have been noticing?

Interro-negative form

Simple form	V-ing form
couldn't I notice? couldn't you notice? couldn't he notice? couldn't we notice? couldn't you notice? couldn't they notice?	couldn't I be noticing? couldn't you be noticing? couldn't he be noticing? couldn't we be noticing? couldn't you be noticing? couldn't they be noticing?
Perfect	V-ing perfect
couldn't I have noticed? couldn't you have noticed? couldn't he have noticed? couldn't we have noticed? couldn't you have noticed? couldn't they have noticed?	couldn't I have been noticing? couldn't you have been noticing? couldn't he have been noticing? couldn't we have been noticing? couldn't you have been noticing? couldn't they have been noticing?