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Unit 7 Grammar,佟彦轩,祈使句：,用来表示请求、命令、劝告、建议的句子，语气强烈。见语法书P178-181 句子以动词原形打头，以句点或叹号结尾。 否定形式： Dont + 动词原形 No +动词原形 Never + 动词原形,Model(例子):,Come on. Lets enter together. Lets fill out the entry forms. Always check the tires before you ride. Never ride with a flat tire. Dont forget! Use your brakes.,Stay on the track. Dont ride too close to other bikes. Be careful. Dont skid. Watch out for puddles. Go, Matt, go! Look! Dont move.,bike, bicycle,pump打气筒 seat车座 brakes车闸 tire pedal脚蹬 handlebars车把 helmet,副词adv.,用来修饰动词、形容词等，表示时间、地点等。语法书P59 时间副词 地点副词 程度副词very, too, little 疑问副词 方式副词,形容词adj.变副词adv.规则,一般直接加ly，“元e”去e加ly，“辅y”改i加ly，le结尾e改y。 quick quickly slow slowly bad - badly 特殊变化： good well hard hard fast fast,形容词与副词区别,形容词用来修饰名词，放在名词前。 She is a good swimmer. 副词用来修饰动词，放在动词后。 She swims well.,Write the adverbs写出相应副词,She is a hard worker. She works hard. He is a fast rider. He rides fast. She is a good swimmer. She swims well.,形容词adj.,名词n.,动词v.,副词adv.,Write the adverbs,You are quick learners. You learn quickly. This is a slow train. It moves slowly.,情态动词：,表示人说话的语气或情态。语法书P122 can, may, must, need, should, have to 情态动词与任何词搭配都没有任何变化，即：情态动词+v.原,must 与 have to,must表示一种主观的需要，意思为“必须，得，要”； have to表示一种客观的需要，意思是“不得不 ”,
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