I can antedate you can antedate he can antedate we can antedate you can antedate they can antedate
V-ing form
I can be antedating you can be antedating he can be antedating we can be antedating you can be antedating they can be antedating
Perfect
I can have antedated you can have antedated he can have antedated we can have antedated you can have antedated they can have antedated
V-ing perfect
I can have been antedating you can have been antedating he can have been antedating we can have been antedating you can have been antedating they can have been antedating
Negation
Simple form
I can't antedate you can't antedate he can't antedate we can't antedate you can't antedate they can't antedate
V-ing form
I can't be antedating you can't be antedating he can't be antedating we can't be antedating you can't be antedating they can't be antedating
Perfect
I can't have antedated you can't have antedated he can't have antedated we can't have antedated you can't have antedated they can't have antedated
V-ing perfect
I can't have been antedating you can't have been antedating he can't have been antedating we can't have been antedating you can't have been antedating they can't have been antedating
Interrogative form
Simple form
can I antedate? can you antedate? can he antedate? can we antedate? can you antedate? can they antedate?
V-ing form
can I be antedating? can you be antedating? can he be antedating? can we be antedating? can you be antedating? can they be antedating?
Perfect
can I have antedated? can you have antedated? can he have antedated? can we have antedated? can you have antedated? can they have antedated?
V-ing perfect
can I have been antedating? can you have been antedating? can he have been antedating? can we have been antedating? can you have been antedating? can they have been antedating?
Interro-negative form
Simple form
can't I antedate? can't you antedate? can't he antedate? can't we antedate? can't you antedate? can't they antedate?
V-ing form
can't I be antedating? can't you be antedating? can't he be antedating? can't we be antedating? can't you be antedating? can't they be antedating?
Perfect
can't I have antedated? can't you have antedated? can't he have antedated? can't we have antedated? can't you have antedated? can't they have antedated?
V-ing perfect
can't I have been antedating? can't you have been antedating? can't he have been antedating? can't we have been antedating? can't you have been antedating? can't they have been antedating?