Dấu hiệu của thì quá khứ đơn là

• ago

• since

• last

• already

Dấu hiệu của thì hiện tại hoàn thành là

• ago

• for

• since

• yesterday

• last

They are Past simple forms

• S - V-ed/ V2

• S - V-s,es

• S- will V

• S- didn't V

• S - have/has

  V-ed/V3

Form of present perfect tense:

• S - V-ed/V2

• S - have/ has -

  V-ed/V3

• Did - S - V?

• Have/ Has - S -

  V-ed/ V3?

Na ..............to the countryside for a week.

They ................to the market yesterday to buy some vegetables.

We .....................this room since last week.

• hasn't cleaned

• haven't cleaned

• didn't clean

What..............you .................last night?

I .....................T.V.

• have / done

  have watched

• has / done

  watched

• did / do

  have watched

• did/ do

  watched

We ................students for 8 years.

• have been

• has been

• are

• were

My uncle ...................in New York for 5 years and he lives in Ho Chi Minh city now.

• lived

• have lived

• has lived