4 When is used when the sentences refer to a single event in the past. hen”and“ while” are used when the sentences refer to a period of time in the past. As is used when the sentences refer to a progressive change (Student( Times
“When” is used when the sentences refer to a single event in the past. “When” and “while” are used when the sentences refer to a period of time in the past. “As” is used when the sentences refer to a progressive change
Match the two parts of the sentences Answer 2。d 3 4.a SharAn tud lent( Times
Match the two parts of the sentences. Answer: 1. b 2. d 3. c 4. a
Work in four make sentences similar to those in Part 2, using when, by the time, Whiloibds.answers: o While he was a child he lived in the countryside When he was young. he lived with his grandmother. o When he lived in hunan province. he collected folk songs and music (Student( Times
Work in four. Make sentences similar to those in Part 2, using when, by the time, while, as. Possible answers: •While he was a child, he lived in the countryside. •When he was young, he lived with his grandmother. •When he lived in Hunan Province, he collected folk songs and music
o While he lived in hunan province he planted rice. When he attended central Conservatory of music, he heard western music for the first time (Student( Times
•While he lived in Hunan Province, he planted rice. •When he attended Central Conservatory of Music, he heard western music for the first time
2. tilll until 表示“一直到…时”,用til,主句和从 句都用背定形式。表示“直到…才” 时,用 until,主句用否定形式,从句用 肯定形式,间或也用 till, until可放句首。 如 到他妈妈进来他才起床 He didn't get up until his mother came in. 那个年轻人看书一直到熄灯。 The young man read till the light went out SharAn tud lent( Times
2. till , until 表示“一直到……时”，用till，主句和从 句都用肯定形式。表示“直到……才” 时，用 until，主句用否定形式，从句用 肯定形式，间或也用till。until可放句首。 如： 到他妈妈进来他才起床。 He didn't get up until his mother came in. 那个年轻人看书一直到熄灯。 The young man read till the light went out