语法知识告诉我们，英语中的三大从句各有用途。定语从句起修饰或包装的作用;名词性从句提供信息;状语从句补充说明，增加额外信息量。那么这三种从句是否也可以用在口语中并且发挥同样的用途呢? 下面，本文将从语法角度来解释口语考试中英语从句的巨大威力。

一、定语从句经典系列

① (名词或代词) is the kind of (person/place/thing…) who (which/that) is…

② (名词或代词) is a (person/ place…) who (which) gives you the impression of being…

③ (名词或代词)is one of the most (形容词) (名词) I have ever seen/met/known.

④ (地点名称) is a place where you can do sth.

⑤ (时间名词) is a day (occasion/the time) when you do sth.

说明：口语考试的话题频繁涉及人物，地点，物品，事件。套用上面句型后的表达效果不一般。可见，定语从句的使用在口语中可以起到“包装”作用。

二、名词性从句经典系列

① The reason why I (admire him/like the place…) is that +从句

② The most important thing is that+从句

③ Another thing is that+从句

④ What I mean is that + 从句

⑤ What I’d like to say is that +从句

以上名词性从句①到③是引出个人观点或信息时的过渡句型，在口语表达中可以起到建构框架，使条理清晰层次分明的作用。而④和⑤则是用于进一步解释说明。套用实例：

The reason why I admire Yaoming is that he is a legend and also a great guy. The most important thing is that he is one of China’s most recognizable athletes. What I mean is， his image can be seen everywhere， he is a household name. Another thing is that Yao has also participated in many charity events during his career. What I’d like to say is that he not only donated money to relief work， but also created a foundation to help those in need.

三、状语从句经典系列

① I first got to know him/it when + 从句(过去式)

② (名词或代词) have (动词过去分词) since +从句(过去式)

③ If I had the chance， I would like to…

④ If …， then it is quite possible that I will…

以上句型只需稍加变动，便可应用于多种话题。句型之间的有机组合还可成为集合，碰到没话说的时候十分顶用。

句型①套用实例：

I first got to know him when I was studying in primary school. (人物题通用)

I first read the story/saw the programme when I was visiting my grandparents three years ago. (物品题通用)

I first learned how to skate/play basketball when I was in high school. (兴趣爱好题通用)

句型②套用实例：

We have lost contact since he moved out of town.

I have stopped watching the programme since I entered the university where TV was not available.

I have been practicing basketball on a regular basis ever since I knew how to play it.

句型③是虚拟语气，表达一种设想。当问题为would you like to…时，建议使用该句型。另外，还可以在无话可说时用来应急。套用句型：

If I had the chance, I would like to travel to California and visit my best friend who I haven’t seen for ages.

If I had the chance, I would like to ask Yaoming to autograph my basketball.

句型④是在分情况讨论问题时必备句型，也是丰富回答内容的经典招数。套用实例：

Q： What do you usually do at weekends?

A： Well, it’s hard to say. I mean, if I am with friends, then it’s quite possible that we will go window shopping or traveling around. But if I am alone, it’s more likely that I will just stay at home and do some washing and cleaning.

当然，以上两种情境还可以变换成多种可能，如按天气状况分为If it is good weather，和If it is bad weather; 按时间多少分为If I’ve got a lot of time，和If I am fairly busy; 等等。

综上，三大英语从句在口语中的适量使用可以起到意想不到的效果，既在语法上赢得了优势，又可以帮助摆脱考场上无话可说的尴尬。