My sister treated me to a bottle of milk just now.我姐姐刚刚请我喝了一瓶牛奶。
(3)“treat＋疾病”意为“治疗某种疾病”。
A doctor is not able to treat every disease.一个医生不能治疗每种病。
(4)treat还可作名词，意为“”，为不可数名词。
It's my treat today. 今天我请客。
例练4
1．I am eighteen years old, so don't treat me ________ a child.
A．as B．with C．to
2．—I want to treat you ________ a dinner. Would you like to come?
—Sure, I'd love to.
A．about B．with C．to
考点5.mistake n．错误，失误v．误会，误解
【点拨】(1)make a mistake/mistakes
It's easy to make a mistake. 犯错误很容易。
(2)by mistake
He put salt into the tea by mistake. 他把盐误放进茶里了。
(3)mistake A for B
She mistook my book for her own. 她把我的书错当成她自己的书了。
例练5
1．—Sorry, I took your pen ________ mistake.
—It doesn't matter.
A．for B．by C．as
2．My son is so careless that he always makes many ________ in his homework.
A．plans B．decisions C．mistakes
考点6.look up (在词典、参考书中或通过电脑) 查阅；抬头看
【点拨】look up是“动词＋副词”结构的短语，若代词作宾语，需放在look和up之间，且代词需用宾格形式。
If you don't know the new word, you can look it up in the dictionary. 如果你不认识这个新单词，你可以查一下词典。
Look for