语法点六 情态动词can和could -【语法培优】2022-2023学年六年级下册英语（外研版）一起 

20 六年级英语•下册 ★培优计划★ 语法点六　情态动词can和could 读一读,学会情态动词can和could的用法 含义：情态动词主要用以表明说话者对某一行为的态度和观点,主要包括揣测、判 断、需要、可能等各种意愿。情态动词不能单独作谓语,只能和动词原形一起构成 谓语,没有人称和数的变化。 链接教材功能句式： 1.I can carry the box. 我能拿这个盒子。 2.Who can help me? 谁能帮助我? 3.After that she couldn􀆳t see or hear. 在那之后,她看不见也听不见。 情态动词can和could的用法区别 1.表示能力,意为“能够,会”。 can表示现在具备的能力,而could是can的过去式,表示过去具备的能力。 例如:I can jump high. The clever boy could speak English when he was four years old. 2.表示询问、请求及允许。 could在态度上要比can更客气,语气更委婉,更含有尊重之意。 例如:Could you help me? 􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋􀪋 多学一点 1.当表示允许别人做某事时,用can而不用could。 例如:—Could I use your pen? —Of course you can. 2.can表示推测,常用于否定句或疑问句中。 例如:That can􀆳t be Mary. She􀆳s in hospital. ★培优计划★ 六年级英语•下册 21 记忆小口诀 can的用法歌诀: 我是情态动词can,若表能力我能担。 不管主语是什么,我的模样都不变。 动词原形站后边,一般疑问句我提前。 否定句我后not添,学好我并不难。 测一测,看你掌握了多少 Ⅰ.单项选择(难度☆) ( )1.—Excuse me, you tel me where the nearest bus stop is? —Sorry. I􀆳m new here. A.need B.could C.must ( )2.—Excuse me, which is the way to the bank? —Sorry. I don􀆳t know. But you ask for the police. A.need B.can C.must ( )3.What your sister do when she was three years old? A.can B.could C.able to ( )4.I run fast last year, but I now. A.could; can B.could; couldn􀆳t C.couldn􀆳t; can ( )5.—Could you help me? — A.Sorry, you couldn􀆳t. B.Sorry, I can􀆳t. C.No, you can􀆳t. 22 六年级英语•下册 ★培优计划★ ( )6.—Can I have ice cream, Mum? —Sorry, we don􀆳t have any. A.some B.any C.a Ⅱ.用can, could, can􀆳t, couldn􀆳t填空(难度☆☆) 1.I speak some English now, but I speak little before. 2.She jump high before, but she jump high now. She is good at jumping. 3.The book be hers. There is her sister􀆳s name on the cover. 4.What you do when you were a baby?