1. Doing morning exercise is very good. To do exercise is very good. 2. It is easy to learn English well. 3. It is nescessary to know a foreign language. 4. To swim in the river is dangerous. 5. It is not hard for us to do that exercise. 6. Travelling around the world was very wonderdul. 1. It takes me ten minutes to go to school. 2. It took him an hour to do that exercise. 3. It takes me fifteen minutes to get to the post office.

CÁC BẠN HÃY CHẤM ĐIỂM VÀ CTLHN CHO MÌNH NHÉ ><

I. It be:  It + be (is/are/was/were) + ADJ + To V

=> To V ... be (is/are/was/were) + ADJ

=> Ving ... be (is/are/was/were) + ADJ

1 Doing morning exercises is very good.

To do morning exercises is very good.

2 It is not easy to learn English well.

3 It is necessary to know a foreign language.

4 To swim in the river is dangerous.

5 It is not hard for us to do that exercise.

6 Travelling around the world was very wonderful.

II. It takes : It takes/tool/will take + SO + time + toV 

=> S + spend(s)/spent/will spend + time + Ving 

1 It takes me ten minutes to go to school by bicycle.

2 It took him an hour to do that exercise.

3 It takes me fifteen minutes to get to the post office.