I can strive you can strive she can strive we can strive you can strive they can strive
V-ing form
I can be striving you can be striving she can be striving we can be striving you can be striving they can be striving
Perfect
I can have striven you can have striven she can have striven we can have striven you can have striven they can have striven
V-ing perfect
I can have been striving you can have been striving she can have been striving we can have been striving you can have been striving they can have been striving
Negation
Simple form
I cannot strive you cannot strive she cannot strive we cannot strive you cannot strive they cannot strive
V-ing form
I cannot be striving you cannot be striving she cannot be striving we cannot be striving you cannot be striving they cannot be striving
Perfect
I cannot have striven you cannot have striven she cannot have striven we cannot have striven you cannot have striven they cannot have striven
V-ing perfect
I cannot have been striving you cannot have been striving she cannot have been striving we cannot have been striving you cannot have been striving they cannot have been striving
Interrogative form
Simple form
can I strive? can you strive? can she strive? can we strive? can you strive? can they strive?
V-ing form
can I be striving? can you be striving? can she be striving? can we be striving? can you be striving? can they be striving?
Perfect
can I have striven? can you have striven? can she have striven? can we have striven? can you have striven? can they have striven?
V-ing perfect
can I have been striving? can you have been striving? can she have been striving? can we have been striving? can you have been striving? can they have been striving?
Interro-negative form
Simple form
can I not strive? can you not strive? can she not strive? can we not strive? can you not strive? can they not strive?
V-ing form
can I not be striving? can you not be striving? can she not be striving? can we not be striving? can you not be striving? can they not be striving?
Perfect
can I not have striven? can you not have striven? can she not have striven? can we not have striven? can you not have striven? can they not have striven?
V-ing perfect
can I not have been striving? can you not have been striving? can she not have been striving? can we not have been striving? can you not have been striving? can they not have been striving?