1、The bite of a mad dog is fatal.被疯狗咬伤会致死的。

2、The boy was bitten by a mad dog.那个男孩被一条疯狗咬了。

3、A mad dog may bite people.疯狗会咬人。

4、You can be as mad as a mad dog at the way things went.你可以像疯狗一样疯狂。

5、There's a mad dog chasing people!有只疯狗在追人