动词不定式1.feel, hear, listen to 等感观动词和 have, let , make等使役动词后的补足语,在主动语态中,不定式不带to;在被动语态中,则必须带to。如:I often hear him sing the song. / He is often heard to sing the song.2. 不定式短语位于介词but, except, besides后时,如果这些介词之前有行为动词do 的各种形式,那么,这些介词后的不定式不带to,否则要带to。如:She could do nothing but cry. / It has no choice but to lie down and sleep.3. 不定式修饰的名词或代词与不定式逻辑上构成主谓关系时,不定式往往用主动形式。如:Have you got a key to unlock the door? (A key unlocks the door.)4. 不定式和它前面被修饰的名词或代词构成逻辑上的动宾关系,又和该句的主语构成逻辑上的主谓关系时,不定式常用主动形式。如:I have got a letter to write.( I write a letter.)5.如果不定式作表语形容词的状语,且和句中主语构成逻辑上的动宾关系时,不定式多用主动形式。如:The book is difficult to understand.( to understand the book)
当这几个词用作连系动词的时候,它们的意思分别是“看起来”、“听起来”、“闻起来”、“尝起来”、“摸起来”,其用法特点如下:特点一通常以被感觉的东西作主语,虽有被动词味,但不用被动语态。如:误:The material is felt nice. 这料子摸起来不错。(is felt 应改为feels)误:The soup is tasted delicious. 这汤味道不错。(is tasted应改为tastes)特点二其后均可接介词 like。如:This looks (tastes, smells, feels) like an orange. 这东西看起来(吃起来,闻起来,摸起来)像桔子。另外,taste和smell后还可接介词of,表示“有…的味道”:It tastes [smells] of fish. 这东西有鱼的味道。特点三除look外均不用于进行时态(即使是look用于进行时态也不多见)。如:You look [are looking] tired this evening. 今晚你好像很累。但是不说What you says is sounding reasonable.【注】feel 表示“感觉”可用于进行时:How are you feeling now? 你现在感觉如何?I’m feeling terrible. 我感到难受极了。另外,若以上动词用作实意动词,则可以用于进行时态:He is tasting the pudding. 他在尝布丁。特点四除look外,均不能接 to be(即使是look后接to be也不多见)。如:She looks (to be) the best person for this job.?【注】feel 有时可表示“使人感觉起来…”:It feels cold in here. 这儿很冷。</p 产品:澳博培训供货总量:不限产品价格:议定包装规格:不限物流说明:货运及物流交货说明:按订单