例3： She was writing a letter when I came in.
我进来时，她正在写信。
②表示在过去
某一时间内正 在进行的动作。
例4 The barber was cutting my hair when they arrived.
他们到达时，理发师正在给我剪头发。
Oral Practice
3
4
表示思维或心理状态的动词：
believe (认为), forget, consider, 表示所属关系的动词：
know, remember, hope, wish, want 等
belong, have, own, hold (容纳) 等
用
所 给
• 1. We w_e_r_e_w__a_s_h_in_g_ (wash) our clothes at six yesterday evening.
Pairwork:
• Patterns: • A: What were you doing at nine o’clock last Sunday morning? • B: I was sleeping. How about you? • A: I was doing my homework. • B: You are kidding
1.when 既指时间 点，也可指一段 时间;
while只指一段时 间.
1.My mother was cooking dinner while my father was watching TV. 2.When the UFO landed,
the boy was walking down the street.
2.公式:
