二不定式的逻辑主语 1、不定式的逻辑主语常不出现在句中。 2、句子的主语，宾语有时是不定式的逻辑主语。 3、不定式前“fo+名词/代词”结构中的名词或代词也可 以用来表示不定式的逻辑主语。 4、 在“t+be+形容词+of+名词代词+todo”结构中，名词 或代词为不定式的逻辑主语。该结构中的形容词通常用 来表示人的品质。例如：kind,good,nice,bad,cruel,. honest,bold,thoughtful,right,wrong,wise,clever, silly,.foolish,careless,rude等。 例如： It's very kind of you to call to tell me about the conference
二 不定式的逻辑主语 1、不定式的逻辑主语常不出现在句中。 2、 句子的主语，宾语有时是不定式的逻辑主语。 3 、不定式前“for+名词/代词”结构中的名词或代词也可 以用来表示不定式的逻辑主语。 4、 在“It+be+形容词+of+名词/代词+to do”结构中，名词 或代词为不定式的逻辑主语。该结构中的形容词通常用 来表示人的品质。例如：kind, good, nice, bad, cruel, honest, bold, thoughtful, right, wrong, wise, clever, silly, foolish, careless, rude等。 例如： It’s very kind of you to call to tell me about the conference
三、不定式的用法 在句子中可以用作主语、表语、宾语、定语和状语 1不定式做主语 1)To say something is one thing;to do it is another. 2)It is not a good idea to build houses along the lines where two of the earth's plates join together. 注：充当主语的不定式即可置于句首，位于谓语动词之 前，也可作为句子的真正主语置于句末，用作形式主语。 2不定式作表语 3)Her uncle seems to be acting rather strangely towards her these days. 4)The purpose of the fence is to keep out a type of wild dog called a“Dingo”. 5)One suggested answer is for farmers to limitthe number of their cattle. 注：充当表语的不定式一般位于be、seem等系动词后
三、不定式的用法 在句子中可以用作主语、表语、宾语、定语和状语 1 不定式做主语 1)To say something is one thing; to do it is another. 2)It is not a good idea to build houses along the lines where two of the earth’s plates join together. 注：充当主语的不定式即可置于句首，位于谓语动词之 前，也可作为句子的真正主语置于句末，用作形式主语。 2 不定式作表语 3)Her uncle seems to be acting rather strangely towards her these days. 4)The purpose of the fence is to keep out a type of wild dog called a “Dingo”. 5)One suggested answer is for farmers to limit the number of their cattle. 注：充当表语的不定式一般位于be 、seem等系动词后
3不定式作宾语 6)Shylock agreed to lend Antonio money on one condition. 注：充当宾语的不定式位于及物动词后。常用不定式作 宾语的动词有：agree,plan,determine,dare,refuse, hope,wish,expect,promise,choose,pretend, decide,manage,intend,offer,afford,demand. 7)The dusty air makes it difficultto get a clear picture of space. 注：充当宾语的不定式如果有自已的表语，则可用代替 这个不定式的t作为形式宾语，而作为真正宾语的不定式 则放在表语之后。以t作为形式宾语的这种结构常用在 think,feel,find,make,consider等动词之后
3 不定式作宾语 6)Shylock agreed to lend Antonio money on one condition. 注：充当宾语的不定式位于及物动词后。常用不定式作 宾语的动词有：agree, plan, determine, dare, refuse, hope, wish, expect, promise, choose, pretend, decide, manage, intend, offer, afford, demand. 7)The dusty air makes it difficult to get a clear picture of space. 注：充当宾语的不定式如果有自己的表语，则可用代替 这个不定式的it作为形式宾语，而作为真正宾语的不定式 则放在表语之后。以it作为形式宾语的这种结构常用在 think,feel, find, make, consider等动词之后
4不定式作宾语补足语 8)The powder made from fish,blood and bones will make the cabbage plants grow big and strong. 9)Portia told Bassanio to go to his friend at once. 注：在下列动词后作宾语补足语的不定式通常不带to。 这些动词是observe,notice,see,hear,watch,have, feel,make,let。但上述动词转换为被动语态时，其后 的不定式须带to。例如：The cabbage plants will be made to grow big and strong
4 不定式作宾语补足语 8)The powder made from fish, blood and bones will make the cabbage plants grow big and strong. 9)Portia told Bassanio to go to his friend at once. 注：在下列动词后作宾语补足语的不定式通常不带to。 这些动词是observe, notice, see, hear, watch, have, feel, make, let。但上述动词转换为被动语态时，其后 的不定式须带to。例如：The cabbage plants will be made to grow big and strong
四、不定式不带to的用法 1.不定式用于Why和Why not之后不带to。 Why spend so much money? Why not ask Susan to help you? 2.当介词except、but前有do、did、does时，其后的不定 式不带to。 Can't you do anything but ask silly questions? (有do,无to) 试比较：There's nothing to do but wait. There's no choice but to wait.(无do,需要to) 3.不定式在had better/rather、would rather/sooner,. rather/sooner than等短语后不带to。 You'd better try again. I'd rather be told the truth than be lied to
四、不定式不带to的用法 1.不定式用于Why和Why not 之后不带to。 Why spend so much money? Why not ask Susan to help you? 2.当介词except、but前有do、did、does 时， 其后的不定 式不带to。 Can't you do anything but ask silly questions? （有do，无to） 试比较：There's nothing to do but wait. There's no choice but to wait.（无do，需要to） 3.不定式在had better／rather 、 would rather／sooner, rather／sooner than等短语后不带to。 You'd better try again. I'd rather be told the truth than be lied to