English verb conjugation
CAN SELECT

Regular verb: select - selected - selected

Affirmation

Simple form	V-ing form
I can select you can select he can select we can select you can select they can select	I can be selecting you can be selecting he can be selecting we can be selecting you can be selecting they can be selecting
Perfect	V-ing perfect
I can have selected you can have selected he can have selected we can have selected you can have selected they can have selected	I can have been selecting you can have been selecting he can have been selecting we can have been selecting you can have been selecting they can have been selecting

Negation

Simple form	V-ing form
I can't select you can't select he can't select we can't select you can't select they can't select	I can't be selecting you can't be selecting he can't be selecting we can't be selecting you can't be selecting they can't be selecting
Perfect	V-ing perfect
I can't have selected you can't have selected he can't have selected we can't have selected you can't have selected they can't have selected	I can't have been selecting you can't have been selecting he can't have been selecting we can't have been selecting you can't have been selecting they can't have been selecting

Interrogative form

Simple form	V-ing form
can I select? can you select? can he select? can we select? can you select? can they select?	can I be selecting? can you be selecting? can he be selecting? can we be selecting? can you be selecting? can they be selecting?
Perfect	V-ing perfect
can I have selected? can you have selected? can he have selected? can we have selected? can you have selected? can they have selected?	can I have been selecting? can you have been selecting? can he have been selecting? can we have been selecting? can you have been selecting? can they have been selecting?

Interro-negative form

Simple form	V-ing form
can't I select? can't you select? can't he select? can't we select? can't you select? can't they select?	can't I be selecting? can't you be selecting? can't he be selecting? can't we be selecting? can't you be selecting? can't they be selecting?
Perfect	V-ing perfect
can't I have selected? can't you have selected? can't he have selected? can't we have selected? can't you have selected? can't they have selected?	can't I have been selecting? can't you have been selecting? can't he have been selecting? can't we have been selecting? can't you have been selecting? can't they have been selecting?