第 70 课: 更多的动词；疑问代词：谁，哪；副词：平时-5

The workman is wearing a hard hat. 这个工人戴着安全帽

The workman usually wears a hard hat, but he is not wearing a hard hat now. 这个工人平时戴着安全帽，可现在没有戴安全帽

Soldiers carry guns, but these soldiers are not carrying guns. 士兵平时带着枪，可这些士兵现在没有带着枪

Soldiers carry guns and these soldiers are carrying guns. 士兵平时带着枪，这些士兵现在拿着枪

The young men in the blue suits are singing. 这两个穿蓝西装的小伙子在唱歌

The young men in the blue suits sing, but they aren't singing now. 这两个穿蓝西装的小伙子是唱歌的，可现在没有唱歌

Dogs don't usually wear clothing and this dog is not wearing clothing. 狗一般不穿衣服，这只狗没有穿衣服

Dogs don't usually wear clothing, but this one is wearing clothing. 狗一般不穿衣服，可这只狗穿着衣服