In the sentence "スーさんは高校に英語を **教え** に行きます" [listen
here](https://clyp.it/yjbfdaaa?token=bbc2a2945f61652481eca66639492f4d)

Why is the verb to teach like this: "教え". Instead of "教えり"? I thought that
because it is a Godan verb ending in る it gets changed to り. I know it does
that when ending in ます, but why not when it is in the middle of a sentence?

I hope I haven't misheard what what said and made a fool of myself.

_edit: I listened to the next sentence in the exercise and this one doesn't do
the same as the previous sentence: スーさんは喫茶店にコーヒーを **飲み** に行きます, this is really
confusing me!_
CC BY-SA 4.0
2020-05-16T13:30:18.970
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2020-05-20T09:00:38.060
2020-05-16T13:37:06.397
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question
verbs conjugations listening
Why is the verb 教える in this form?
〜に行きます must be preceded by a **verb stem** : in other words, drop 〜ます from the
polite form.

Examples:

> 教える → **教え** ~~ます~~ → **教え** → **教え** に行きます
>
> 飲む → **飲み** ~~ます~~ → **飲み** → **飲み** に行きます
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2020-05-18T21:01:31.753
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2020-06-17T08:18:27.500
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answer
The verb form you are seeing is the verb stem. Verb stem + に行きます is a
particular construction meaning "to go [somewhere] for the purpose of doing
something". So the first sentence is "Sue went (traveled) to the high school
to teach English" and the second is "Sue went to the cafe to drink coffee."
It's a very common and useful construction, a good addition to anyone's
Nihongo arsenal.
CC BY-SA 4.0
2020-05-20T09:00:38.060
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answer