一般现在时 I usually go to school on foot
She often gets up at 6:00
现在进行时 He is singing
The are taiking
一般将来时 I am going to the park
I will do my homework
一般过去式 She went to Xi`An last week
I was late for shool this morning
现在完成时 She has been here for a month
He has teached us for 3 years