GRAMMAR UNIT 1.

-PRESENT PERFECT CONTINUOUS.

FORM.

·AFFIRMATIVE.

I/You have been sleeping.

He/She/It has been sleeping.

We/You/They have been sleeping.

·NEGATIVE.

I/You have not (haven't) been sleeping.

He/She/It has not (hasn't) been sleeping.

We/You/They have not (haven't) been sleeping.

·INTERROGATIVE.

Have I/you been sleeping?

Has he/she/it been sleeping?

Have we/you/they been sleeping?

USES.

An action that started in the past and which still continues in the present.

An action whose results are still apparent.

EXAMPLES.

How long have you been staying at the hotel?

I'm tired. I have been reading The Lord of the Rings all night.

TIME EXPRESSIONS.

For a year, since 2002, how long ...?, all night/morning/day/week.