lesson 9(12)

Gi¸o viªn: TrÇn ThÞ HuÖ
Tæ : Lý Anh –
Tr­êng: THPT Trung Gi·
Gi¸o ¸n d¹y ngµy: 24 1 2008– –

a bPham Tuan Yuri Gagarin
A - Warm up
B. Introduction

LESSON 9: NATURAL S CIENCE AND
PH YSICS
Situation 1
I. New words
1. let (sth) off (v)
2. object (n)
3. certainly (adv)
4. gravity (n)
5. force (n)
6. earth (n)
7. towards (pre)
8. spaceship (n)
9. zero (n)
10. float (v)

If + S + V (simple present)……, S + will / shall + V (simple future)……..
II. Grammar
* If you let an object off your hand, it will certainly fall.
Ex2: If it ,trees better.
Ex3: You …………… late for school if you …… up late.
Ex4: If Minh ……………... to the teacher , he …………………… the lesson.

1. Conditional sentence type1 (Real present conditional sentence)
- Form:
- Use: To express an action that can happen at present or in the future.
If-clause
Main-
clause
Ex1: If Jane comes, Jack will be very happy.
rains will grow
will be get
doesn’t listen will not understand

III. Questions and answers
1. What will happen if you let an object off your hand?
-> It will certainly fall.
2. What is gravity?
-> it is the force of the earth to attract everything towards its center.
3. What will happen if gravity is zero?
-> Everything will float.
1. What / happen / let off / object ?
2. What / gravity ?
3. What / happen / gravity / zero ?
Groupwork