外研版七年級英語下冊《Everyone will study at home》Life in the future PPT優(yōu)質課件，共15頁。
In twenty years’ time, maybe there won’t be any schools!
“in+一段時間”表示“一段時間之后”，常用于一般將來時。
His father will come back in an hour.
There will be a heavy rain in three days.
—How soon will you be back?
—In a month.
In twenty years’ time, maybe there won’t be any schools!
“twenty years’ ”是名詞所有格。名詞所有格形式多樣。
①單數(shù)名詞和不以-s結尾的復數(shù)名詞在詞尾直接加 “ ’s ”。
The short woman under the tree is Mary’s mother.
②以-s結尾的復數(shù)名詞在詞尾只加 “ ’ ” 。
The twins’ bedroom is big and clean.
③如果一樣東西為兩人或幾人共同所有，則在最后一個名詞的詞尾加
“ ’s ” ；如果屬各自所有時，則在各個名詞詞尾都加 “ ’s ” 。
This is Jim and Kate’s house.
Tom’s and Alice’s mothers are all teachers.
They can ask their teachers questions by Internet, telephone or email.
by prep. 表示“通過……；靠……方法/方式“。
He makes a living by working as a waiter.
What do you mean by saying that?
by表示“乘（交通工具）”時，后面直接跟表示交通方式的名詞。
I will leave for Beijing by air next month.
I often go to school by bus.
Well, I’m not sure.
sure adj.“確信的；確定的”，在句中做表語。
be sure to do sth. 一定/確信會做或會發(fā)生某事
The child is sure to be a teacher.
be sure that + 從句 確信······
We are sure that she is from America.
be sure of/about sb./sth. 對某人（物）有把握
I am sure of his success.
I am not sure about English grammar.
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關鍵詞：Everyone will study at home PPT課件免費下載，Life in the future PPT下載，.PPTX格式；
