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I am glad to 结构︰主词(人)+be 动词+情绪形容词(如 glad，sorry)+不定词。 说明︰不定词放在情绪形容词如 glad，sorry，happy，sad，surprised，troubled等字之后修饰，这是不定词副词的用法。 I am glad to see him. 我很高兴看到他。 Sue was troubled to see trash everywhere. 苏看到到处是垃圾很苦恼。 Sara was excited to see the rock band. 莎拉看到摇滚乐团很兴奋。 tooto 结构︰主词+动词+too+形容词/副词+(for+sb.)+to-不定词 说明︰此句型意为太而(使某人)不能。too 为副词，可修饰副词形容词.too 后也可接含有形容词的单数名词，即too+形容词+a+单数名词不定词，也可以是too much+不可数名词+to或too many+复数名词+to。该句型如提到对某人来说，则加入for+人。该句型表示否定的意义，若加上附加问句，则须用否定，如例句8. He walked too slowly to catch up with me. 他走得太慢而不能跟上我。 It is too dark in this room for me to read a book. 房间太暗，使我无法看书。 This problem is too difficult for them to settle. 这对他们来说真是一个难解的问题。 The price is too low for customers to believe. 价格低得令顾客难以相信。 | 
