句型转换
1 Linda learns English by reading the textbook.
( How ) ( does ) Linda ( learn ) English?
2 I used to live in the village （改为一般疑问句）
( Did ) you ( use ) ( to ) live in the village
3 He used to be terrified of the dark.（改为否定句)
(第一种 He usedn't to be terrified of the dark.
第二种 He didn't use to be terrified of the dark.）
批注：注意English的正确拼写.
笔记:
used to意思是“过去常常”,使用时应注意以下几点：
1.used to中的to 是不定式符号,不是介词,所以其后接动词原形.例如:
People used to believe that the earth was flat.过去,人们总以为地球是扁平的.
2.used to否定式和疑问式的构成有两种形式：作为情态动词,可直接在used后加not构成否定式,直接将used置于句首构成疑问式.used to也可以像普通动词那样借助助动词did构成否定式和疑问式.例如:
They usedn’t / didn’t use to live here.他们过去不住这儿.
Did he use to be a teacher?=Used he to be a teacher?他过去是老师吗?
Where did they use to live?= Where used they to live?他们过去住哪儿?