It usually (to take) me an hour to do my written exercises how old you (to be), when you (to do) it? I (to look) for new dress. You (to have) anything on sale. I (to want) to call you everyday but it (to be) very expensive She (to try) to lose weight You (to come) home at 6 o'clock I (to be) sad. That (to be) why i (to cry)

It usually takes me an hour to do my written exercises.

How old are you?

When will you do it? (When have you done it? When did you do it? - Нет слов, указывающих, в каком времени происходит действие).

I am looking for new dress.

You don't have anything on sale. (You haven't got anything on sale - могут использоваться обе формы).

I want to call you everyday but it is very expensive. (I would like to call you everyday ...)

She tries to lose (her) weight. В данном предложении не хватает притяжательного местоимения.

You come home at 6 o'clock. (Возможно, You came home at 6 o'clock - нет слов, указывающих на то, в прошлом или настоящем времени происходит действие).

I am sad. That is why I am crying.