英语感叹句的构成很简单，其实就3步搞定。
第一步，确定感叹词。英语的感叹句由陈述句变来，一般要由what或how引导。在陈述句中，若中心词是名词时，选用what，若中心词为形容词或副词时，则选用how。如：
Jim is a very smart boy.中心词为名词boy，选用引导词what。
Jim is very smart.中心词为形容词smart，选用引导词how。
第二步，摆好感叹词。确定了中心词为名词后，感叹词what应置于中心词的第一个修饰词之前。如上例中Jim is a very smart boy.的第一个修饰词应是a，所以what应置于a之前，即句子变成Jim is (what) a very smart boy；若确定中心词为形容词或副词后，感叹词how也是置于其第一个修饰词之前。如上例Jim is very smart.的第一个修饰词应是very，所以how则置于very之前，即句子变成Jim is (how) very smart。
第三步，前置感叹词。将感叹词至中心词部分整体前置于句首，若句中有very，so，too，quite，such等修饰词去掉，并于句末加上感叹号即可。故上两例分别变成了What a smart boy Jim is!和How smart Jim is!
有时改感叹句用wha或how均可，但句子结构要变化。如It is a very beautiful park.改感叹句可以是What a beautiful park It is!或How beautiful the park is!
John runs so fast.可改成How fast John runs!也可以What a fast runner John is!
小显身手：将下列句子改为感叹句
1.The children are very active.
2.Lucy writes so carefully.
3.China is a strong country.
4.My sister is so cute.
5.Jack gets up very early every morning.
keys:1.How active the children are!/ What active children they are!
2.How carefully Lucy writes!
3.What a strong country China is!/ How strong China is!
4.How cute my sister is!/ What a cute girl my sister is!
5.How early Jack gets up every morning!
