I can overacheive you can overacheive he can overacheive we can overacheive you can overacheive they can overacheive
V-ing form
I can be overacheiving you can be overacheiving he can be overacheiving we can be overacheiving you can be overacheiving they can be overacheiving
Perfect
I can have overacheived you can have overacheived he can have overacheived we can have overacheived you can have overacheived they can have overacheived
V-ing perfect
I can have been overacheiving you can have been overacheiving he can have been overacheiving we can have been overacheiving you can have been overacheiving they can have been overacheiving
Negation
Simple form
I can't overacheive you can't overacheive he can't overacheive we can't overacheive you can't overacheive they can't overacheive
V-ing form
I can't be overacheiving you can't be overacheiving he can't be overacheiving we can't be overacheiving you can't be overacheiving they can't be overacheiving
Perfect
I can't have overacheived you can't have overacheived he can't have overacheived we can't have overacheived you can't have overacheived they can't have overacheived
V-ing perfect
I can't have been overacheiving you can't have been overacheiving he can't have been overacheiving we can't have been overacheiving you can't have been overacheiving they can't have been overacheiving
Interrogative form
Simple form
can I overacheive? can you overacheive? can he overacheive? can we overacheive? can you overacheive? can they overacheive?
V-ing form
can I be overacheiving? can you be overacheiving? can he be overacheiving? can we be overacheiving? can you be overacheiving? can they be overacheiving?
Perfect
can I have overacheived? can you have overacheived? can he have overacheived? can we have overacheived? can you have overacheived? can they have overacheived?
V-ing perfect
can I have been overacheiving? can you have been overacheiving? can he have been overacheiving? can we have been overacheiving? can you have been overacheiving? can they have been overacheiving?
Interro-negative form
Simple form
can't I overacheive? can't you overacheive? can't he overacheive? can't we overacheive? can't you overacheive? can't they overacheive?
V-ing form
can't I be overacheiving? can't you be overacheiving? can't he be overacheiving? can't we be overacheiving? can't you be overacheiving? can't they be overacheiving?
Perfect
can't I have overacheived? can't you have overacheived? can't he have overacheived? can't we have overacheived? can't you have overacheived? can't they have overacheived?
V-ing perfect
can't I have been overacheiving? can't you have been overacheiving? can't he have been overacheiving? can't we have been overacheiving? can't you have been overacheiving? can't they have been overacheiving?