我想大家都不是很喜欢用别人用过的东西，更别说是吃某人的口水咯！可是，水的水还是水，那亲们是to drink or not to drink, that's a question.

1. I trust your mouth.

某天，一群人去野炊，你带的矿泉水喝完了，于是乎想向你的同学共饮一瓶的bottled water。不料你同学传来了一个怪异的眼神，你得马上说："That's OK. I trust your mouth."意思就是，我不介意你的口水喔！这时你的朋友不知道是可喜还是无奈哦！

很简单吧！这在日常的生活中可以用到的机会还蛮多的。其实你也可以这样说："I'm not worried about your germs."但是，觉得还是上句更传神些许！

2. I am running the bath water.我正在放洗澡水。

这里要注意的是Bath: a large long container that you fill with water and sit or lie in to wash yourself.

American Equivalent: bathtub

比如说：She ran a bath (=put water into a bath) for herself.

还可以用fill the tub。这个tub就是指洗澡用的大浴缸。

a relatively large open container that you fill with water and use to wash the body.

洗冷水澡：Have a cold tub。

I shall have a hot bath and go to bed.我要去洗个热水澡，然后睡觉。

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