牛津譯林版高中英語必修四unit2sportingeventsgrammarandusage課件-wenkub.com
2024-11-13 06:32 本頁面
【正文】 ? You mustn’t miss this football match. It’s very important. ? You needn’t watch the game if you don’t want to. ? — Must we clean the classroom? ? — Yes, you must. /No, you needn’t. need / dare 作為情態(tài)動詞時，兩個詞常用于 疑問句和否 定句 。此外它也可以用來表示說話人的命令、警告、允諾、威脅或決心等，這時它用于第二、三人稱。如： ? We must work hard, or we’ll fail in the examination． ? Two years ago, the poor girl had to leave school for lack of money． ?2) must表示主觀看法， have to則側重于客觀需要。如： ?It was a holiday and the children were able to go to the seaside． ?The girl worked hard so she was able to pass the final test． ?I’m sorry I haven’t been able to play tennis with you recently. obligation ought to/should ? ought to與 should意思接近，大多數(shù)情況下二者可以互換，但是 should談的是自己的主觀看法 , 用于各種人稱。高一下學期 ) Grammar and usage Unit 2 Sporting events Modal verbs 課件描述： 通過對情態(tài)動詞的介紹來幫助學生學習掌握情態(tài)動詞。 情態(tài)動詞沒有人稱和數(shù)的變化，有詞義，但是不完整，不能單獨做謂語，必須和不帶 to的動詞不定式連用。 ought to則更多反映客觀情況，在談到法律、義務和規(guī)定時使用。如： ?We must be strict with ourselves in everything． ?In cities with many cars, some people have to wear masks． obligation have to / must She might win a medal at the Olympics. She may be at home now. She could read and write at the age of 4. She should e to join us. She ought to / will / must help me whenever I am in trouble. certainty might / may/ could / should / oug
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