1) Я не готовлюсь к тесту в данный момент.
2) Мы будем писать тест завтра.
3) Я иногда помогаю маме.
P.S. у тебя предложения немного составленны не правильно. Особенно второе :) Удачи.
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I will be
she will be
he will be
it will be
we shall be(британский вариант)
I will be playing
she will be staying
he will be working
it will be doing
we shall be starting
I will have been
she will have become
he will have drunk
it will have known
we shall have gone
I will have been driving
she will have been riding
he will have been looking
it will have been speaking
we will have been swimming