Present
I    buy
you  buy
he   buys
we   buy
you  buy
they buy

Perfect
I    have bought
you  have bought
he   has bought
we   have bought
you  have bought
they have bought

Past
I    bought
you  bought
he   bought
we   bought
you  bought
they bought

Pluperfect
I    had bought
you  had bought
he   had bought
we   had bought
you  had bought
they had bought

Future
I    will buy
you  will buy
he   will buy
we   will buy
you  will buy
they will buy

Future perfect
I    will have bought
you  will have bought
he   will have bought
we   will have bought
you  will have bought
they will have bought

Present
I    buy
you  buy
he   buy
we   buy
you  buy
they buy

Present
I    have bought
you  have bought
he   have bought
we   have bought
you  have bought
they have bought

Imperfect
I    bought
you  bought
he   bought
we   bought
you  bought
they bought

Pluperfect
I    had bought
you  had bought
he   had bought
we   had bought
you  had bought
they had bought

Present
I    would buy
you  would buy
he   would buy
we   would buy
you  would buy
they would buy

Perfect
I    would have bought
you  would have bought
he   would have bought
we   would have bought
you  would have bought
they would have bought

Present
I    am buying
you  are buying
he   is buying
we   are buying
you  are buying
they are buying

Perfect
I    have been buying
you  have been buying
he   has been buying
we   have been buying
you  have been buying
they have been buying

Past
I    was buying
you  were buying
he   was buying
we   were buying
you  were buying
they were buying

Pluperfect
I    had been buying
you  had been buying
he   had been buying
we   had been buying
you  had been buying
they had been buying

Future
I    will be buying
you  will be buying
he   will be buying
we   will be buying
you  will be buying
they will be buying

Future perfect
I    will have been buying
you  will have been buying
he   will have been buying
we   will have been buying
you  will have been buying
they will have been buying

Present
I    would be buying
you  would be buying
he   would be buying
we   would be buying
you  would be buying
they would be buying

Perfect
I    would have been buying
you  would have been buying
he   would have been buying
we   would have been buying
you  would have been buying
they would have been buying