九下Unit4Grammar课件.ppt

9B Unit 4 Life on Mars Grammar 一、用介词短语把状语从句换成简单句 when 所引导的时间状语从句 1. She started to learn drawing when she was seven. She started to learn drawing________________ . 2.Neil Armstrong received his student pilot s licence when he was 16. Neil Armstrong received his student pilot s licence _______________ at the age of seven at the age of 16 because 引导的原因状语从句 3.He could not go to the party because he had too much homework. He could not go to the party because of too much homework . 4.People might float in space because the gravity is low. People might float in space _________________ _________________. because of the low gravity if 所引导的条件状语从句 5.He could not solve this problem if he has no help. He could not solve this problem _____________ . 6.Humans cannot svrvive if there is no food, water or oxygen. Humans cannot svrvive ______________________ . without help without food, water or oxygen 用介词短语把状语从句换成简单句 1.“when+从句”转换成___________ 2.“because +从句”转换成 _________ 3.“if 的否定句”转换成 __________ at the age of … because of … without Exercise 1.Neil Armstrong took his first flight when he was only six. ( at the age of ) _______________________________________. 2.Yuri Gagarin became the first man to go into outer space at the age of 27. ( when ) ______________________. Neil Armstrong took his first flight at the age of six when he was 27 Yuri Gagarin became the first man to go into outer space 3.People might move to another planet in the future because the population on the earth is increasing rapidly. (because of ) _______________________________________ _____________________________. 4.It would be funny to play football on Mars because of the low gravity. (because) ______________________________________ _____________________. It would be funny to play football on Mars because the gravity is low People might move to another planet in the future because of the rap