中考英语词语辨析(高频80组)及测试题+答案+ 解析 四十六、can(能;可以)与be able to(能够)

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中考英语词语辨析(高频80组)及测试题+答案+ 解析 四十六、can(能;可以)与be able to(能够)

中考英语词语辨析(高频80组)及测试题+答案+ 解析  

四十六、can(能;可以)与be able to(能够)

【辨析要点】

1. 时态差异:① can只有一般现在时(can)和一般过去时(could)两种时态;② be able to有多种时态,可用于一般现在时、一般过去时、现在完成时、将来时等,适用范围更广。

2. 含义与用法:① can除表能、可以(能力、许可)外,还可表可能(否定句/疑问句);② be able to仅表能够(能力),不能表许可可能

3. 特殊用法:① can用于一般过去时表过去的能力,常指天生的或习惯性的能力;② be able to用于一般过去时表过去的能力,常指通过努力完成某事的能力。

【例句】

① He can speak English.(他会说英语。——一般现在时,能力)

② She could swim when she was five.(她五岁时就会游泳了。——一般过去时,天生能力)

③ He has been able to finish the work on time.(他已经能够按时完成工作了。——现在完成时)

④ We will be able to visit the museum tomorrow.(我们明天能够去参观博物馆。——将来时)

⑤ Can I borrow your pen?(我能借你的笔吗?——许可,can专属)

测试题

1. He ______ speak French when he was young. A. can B. could C. was able to D. both B and C

2. She ______ finish the task by herself. She needs help. A. can't B. isn't able to C. couldn't D. both A and B

3. They ______ have a picnic next weekend if the weather is fine. A. can B. will be able to C. could D. are able to

4. ______ I use your phone? My phone is dead. A. Can B. Am I able to C. Could I able to D. Do I able to

5. He ______ pass the exam after hard work. A. can B. could C. was able to D. is able to

答案及解析

1. 答案:解析:时间状语when he was young提示用一般过去时,表过去会说法语couldcan的过去式)和was able to均可表示过去的能力,故选D

2. 答案:解析:结合句意她不能自己完成任务,需要帮助,表不能,一般现在时中,can'tisn't able to均可表示不能couldn't是过去时,不符合语境,故选D

3. 答案:解析:时间状语next weekend提示用将来时,be able to可用于将来时(will be able to);cancould无将来时形式,are able to是一般现在时,均不符合,故选B

4. 答案:解析:结合句意我能用一下你的手机吗?我的手机没电了,表许可,用canbe able to不能表许可CD选项搭配错误(could后需接动词原形,able to前需用be动词),故选A

5. 答案:解析:结合句意经过努力后,他通过了考试,表过去通过努力完成某事的能力,用was able tocanis able to是一般现在时,could表过去习惯性能力(不强调努力),均不符合,故选C

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