问题 introduce sb to sth与introduce

下面的用法与搭配是否正确？introduce sb to sth 把某人介绍给某物introduce sth to sb 把某物介绍给某人谢谢！

问题 be to do sth与be doing sth

The best way to learn new words is reading  English magazines. My dream is to be a teacher. 为什么一个是 to do，一个是doing？有什么具体用法吗？

问题 retire to their yachts or country estates的划分

most of his peers were retiring to their yachts or country estates这里应该是将retire to作为及物动词来看，还是将to之后的成分看作地点状语

问题 是否有be used to do sth这种表达形式(used是形容词表示“习惯了的”)

...rings, the dog-chains, the cruel knives with which Mr. Jones had been used to castrate the pigs and lambs, were all flung down the well.因为castrate是动词原型，所以按be use to习惯于来解不对，按use to曾经来解，那么前面的had been是怎么回事？ 2. It was noticed that ...

问题 help sb do sth的被动语态必须加to吗

主动语态的 help sb (to) do sth 的 to 是可有可无的。而 help sb do sth 的被动语态是不是必须要加上 to 呢？（省略就算错吗）

话题 this was going to be a big day Vs there was going to be a big day

问题 sure of doing../ sure to do...成分问题

请问老师，以下搭配中of doing sth 和 to do sth分别做什么成分？： be sure of dong sthbe sure to do sthmake sure of dong sthmake sure to do sth      

问题 to have done和having done的区别

Whether there is something very special about the Earth to have fostered the variety of life forms.这里的to have fostered是something 的定语吗？如果用having fostered 和用to have fostered的区别在哪？不定式比现在分词突出是一次性/具体事件？

问题 than any other后面接复数名词算错吗

...ry 可以用复数吗？请明确地说明，这里用复数算不算错？For example, it can be proved thatChinahas more people than any other country in the world. 例如，可以证明中国人口比世界上任何其他国家的人口都要多。句子来源：高中英语教材人教版必修...

问题 过去时与现在完成时的区分

...t makes him a good English teacher.—He ________ as a volunteer in the UK for three years, which helps with his work a lot.A. served    B. has served    C. serves    D. had served老师，这题选A,但是看解析还是不能说服自己，我觉得B也可以，这个...

问题 cheat sb of sth 如何理解

...散。调解的人说：There must be some compromise, surely.A说：Not for me. Hector has overreached himself. He has cheated himself of a king's ransom. 台词的翻译是：肯定有折中的办法。对我来说没有。…贪心不足反倒丢了到嘴的肥肉cheat sb of sth 直接字面理...

问题 yield to的意思与用法

Even the recalcitrant car-crash simulations, he thinks, will yield to the new approach soon.他认为，即便是顽固的汽车碰撞模拟问题不久也会出现新的解决方法。我认为这个 yield to 是屈服于的意思，对么？

问题 be off to是固定搭配吗

I'm afraid that this school year is off to a shaky start.be off to是固定搭配吗？off是副词吗？

问题 逗号后面的to do

Longfield Park has a programme of activities throughout the year，and to give you a sample ，this is what's happening in the next few days.请问这里为什么是“to” give you a sample？直接用give不可以吗？

问题 ​量词修饰由对应两部分组成的名词的主谓一致

... have wom out．我的蓝裤子已经穿破了。The two pairs of scissors are Hangzhou－made这两把剪刀都是杭州制造的。Two pieces of good news have been published in today's evening paper.今天的晚报报道了两条好消息。②特殊量词修饰普通名词含有pile， mount...