情態助動詞
置於主要動詞之前,它幫助主要動詞來表達能力、意願、請求、許可、命令、客氣、義務、責任、告誡、或猜測(可能性)等各種不同的語氣或態度。情態助動詞有:can、could、may、might、must、ought to、shall、should、will、would
情態助動詞否定:cannot、could not、may not、might not、must not、ought not to、shall not、should not、will not、would not
情態助動詞的用法 | |
有能力(能,會); 允許(可以,能);請求(能,可以); 可能性 They can ride a bike. You can go home now. Can we join you? | |
有能力(能,會); 請求; 建議; 應該;猜測 You could go home now. You could choose Saturday for swimming. | |
允許(可以,能); 祝願; 猜測 You may come back now. | |
可能、可以;請求; 猜測 I might be late today. He might be angry if you say that to him. | |
責任、義務(必須, 非…不可);告誡;命令(一定要); 猜測 You must turn off the light when you leave. | |
責任或義務(應該,應當); 可能性 You ought to turn off the light when you leave. | |
建議 You shall let me know. | |
責任(應該,應當);可能性 You should turn off the TV before dinner. | |
命令(應該); 可能; 願意 I will be home by 8. | |
要求;希望; 願意 I would be home by 8. |
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