suddenly the storm started.
A. when
B. while
C. until
D. before
2. He was about to tell me the secret __D____someone patted （拍）him on the
shoulder（肩膀）. (上海)
3.用while, when填空：
① _W__h_en_/_W__h_il_e/_A_s_ I was walking down the street, I noticed a police car in front of the store.
② ____W__h_e_n____ John arrived, I was cooking lunch. ③ I was wandering（徘徊） through the
• 5.He _w__il_l c_a_l_l __ (call) you as soon as he_g_e_t_s(get) to Guangdong.
Homework
• Write a short article including adverbials as many as possible.
• 3.Lily _w_a_s _lis_t_en_i_ng_(listen) to music while Lucy _w_a_s__re_a_d_in_g_(read) a story book.
• 4.When the teacher __c_a_m_e____(come) in, the students ___w_e_r_e_t_a_lk_in_g__(talk)
street___w_h__en___ I caught sight of a tailor’s
shop.
二、when／while／as的用法。
when表示从句动作和主句动作同时发生，或先于主句动作； while表示从句的动作与主句动作同时发生，并有延续的含义； as从句动作与主句动作同时发生，常译为“一边…一边…” 。 从句动作和主句动作同时发生，且从句动作为延续性动词时， when，while，as都可使用.
(2)__W_h_e_n_ the boy saw his mother, he stopped crying.
2. when+短暂性动词或延续性动词
• while+延续性动词(一般为be doing。)
(1)He was doing his homework __w_h_e_n_ I saw him.
the moment, the minute, immediately, instantly， every time, since, before, after, until, not…until, as soon as 等
1.They rushed out of the room immediately they heard a loud noise.(他们一听到一声巨响就从房间里 冲了出来）
• Keep the meanings of the conjunctions in mind.
• Finish the exercises about grammar in your books
A. while B. before C. as soon as D. by
5.– Was his father strict with him when he was at
school?
– Yes. He had never praised him ___C__ he became
one of the top students in his grade.
Examples in our textbook
1. When he was orbiting in the capsule, he took photographs of planet earth. 2. When yang landed, Premier Wen Jiabao telephoned the Control Centre to offer his congratulations. 3. When Yang took off from Jiuquan in northwest China at 9 am yesterday, China became the …. 4. While he was travelling in space, Yang spoke to two astronauts aboard the …. 5. While she was waiting a taxi outside, she met Sam Parrish.
A. when B. before C. since D. after 8. We won’t leave here ____A___ our teacher comes back.
A. until B. since C. after D. as soon as 9. I had to finish the picture ____B____ my mother came back.
W_h_e_n_/W__h_il_e_/ A_s_she was singing, we all lost ourselves in her beautiful voice.
注意：延续性动词表达的动作能够延续，如：keep保存，维持；walk走路；read 阅读等；非延续 性动词也称瞬间动词，所表达的动作不能够延续。如：hear听到；return 归还；see看见。
_W__h_e_n_/_W__h_il_e_/A_s__was walking down the street，I saw some policemen．
__W__h_e_n_they heard the news，they were surprised． __W_h_i_le_the child was playing with his toys，his parents were watching TV. They shouted slogans _a_s_they passed the square.
三、When 的特殊用法
We were having a class _w_h_e_n__someone broke in.(突然有人闯了进来). We were about to set off_w_h_e_n__it began to rain. (这时开始下雨了)
总结：相当于and at this / that time。意思为 “正在/刚要……这/那时（突然……）”
• 一、 when/while 的区别 • 1.when表示主从句两个动作同时发生或先后
发生。而while表示主从句两个动作同时发生 或强调主句的动作在从句动作进行期间发生。
(1)_W__h_il_e_ they are waiting for the New Year, they listen to music , sing songs and dance.
(2) Please don’t talk so loud _w__h_il_e_others are working 3.进行时+while+进行时
She was dancing __w_h_i_l_e_ I was singing
4.从句动作和主句动作同时发生，且从句动作为延续性动 词时，when，while，as都可使用
A. as
B. until
C. while
D. when
3. He made a mistake, but then he corrected the
situation __C___ it got worse.
A. until
B. when
C. before
D. as
4. I’ll write to you C____I get there.
A. until B. before C. after D. while 10. John fell asleep ___C_____ he was listening to the music.
A. after B. before C. while D. as soon as
四、时间状语从句其它引导词小结：
When的常用于下列句式：
be doing /be going to do sth be about to do sth. had just done
意思为“正在/刚要/刚做完……这/那时（突然……）”
Exering in the lake ___A___
2. As soon as he comes, I’ll tell him.
3. The moment I saw him, I recognized（认出） him.
4. The boy didn’t go to bed until his parents came back.
用括号内动词的正确形式填空
• 1.My mother _w__as__c_o_o_ki_n_g_(cook) dinner when I __g_o_t___(get) home last night.
• 2.I ___m__e_t___(meet) Lingling when I _w_a_s__w_a_lk_i_ng__(walk) along the street.
A. after
B. unless
C. until
D. when
6. He was about to tell me the secret __D___ someone
patted him on the shoulder.
A. as
B. until