The document outlines the forms of verbs used in active and passive voice across different tenses, including present simple, present continuous, past simple, past continuous, present perfect, past perfect, future simple, future perfect, be going to, modal, and semi-modal verbs. For each tense, it provides an example of an active sentence using the verb "to buy" and the corresponding passive sentence using the same verb.

1. FORM ACTIVE PASSIVE
PRESENT
SIMPLE
PRESENT
CONTINUOUS
PAST SIMPLE
PAST
CONTINUOUS
PRESENT
PEFECT
SIMPLE
PAST
PERFECT
SIMPLE
FUTURE
SIMPLE
FUTURE
PERFECT
SIMPLE
BE GOING TO
MODAL
SEMI –
MODAL
MODAL
PERFECT
They buy the
house
They are
buying the
house
They bought the
house
They were
buying the
house
They have
bought the
house
They had
bought the
house
They will
buy the house
They will have
bought the
house
They are going
to buy the
house
They can
buy the house
They has to
buy the house
They should
have
bought the
house
The house is
bought
The house is
being bought
The house was
bought
The house was
being bought
The house has
been bought
The house had
been bought
The house will
be bought
The house will
have been
bought
The house is
going to be
bought
The house can
be bought
The house has
to be bought
The
house should
have been
bought