英语语法分析

Duval could switch easily from French to English.

杜瓦尔可以在法语和英语之间自如切换。

Do you want to see Monsieur Duval, Sir?

先生是不是想去拜访迪瓦尔先生？

Since Monsieur Duval did not return to see me, I resolved to go to him.

既然迪瓦尔先生没有再来看我，我就决意到他家里去。