1. It takes me 30 minutes to finish this exercise.

2. It is necessary for you to go to bed now.

3. It was at the party that I met her last night.

4. It is in this exercise that there are three mistakes.

5. It was in Paris that she bought this dress.

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`@` Chủ ngữ giả:

`⋆` Cấu trúc với "It":

- It + be + adj + to V + O

- It + be + adj + that + S + V

- It + be + adj + that + S + (should) + V

- It + be/seem + a/an + Noun + that + S + V

- It + be + believed/said/thought/… + that + ...

- It + be + weather condition/ date/ time / distance /…

- It + takes/took + S + N + to V

- It + be + suggested/recommended/advised/… + that + S + (should) + V

`⋆` Cấu trúc với "There":

- There + be + N

- There + V + N