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So I've been trying to say that a friend has lived in America for about 9
months, and is still currently living in America.

Would it be: アメリカで９月間ぐらいに住んでいます。

I'm not sure if I'm using the correct form of 住む, but I don't think it would
be 住んでいました since it is still currently taking place.
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2015-09-22T17:45:02.570
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2015-09-23T06:32:41.437
2015-09-22T19:11:12.633
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question
grammar translation aspect
How to say, "I've been living in America for 9 months" (and still am)?
住む is indeed the correct verb, but you have to structure your sentence
differently to make it clear that you are still living there. 前から is basically
what you are looking for.

9か月前からアメリカに住んでいます。
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2015-09-22T20:40:31.397
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2015-09-22T22:46:20.623
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The construct is more or less correct, but there are a few grammatical errors
in your proposal.

> アメリカで９月間ぐらいに住んでいます。

  1. I believe 住む takes に for the location of residence. 

> アメリカ **に** 住んでいます。

  2. 「９月間ぐらい」 should be 「9ヶ月間ぐらい」, and does not need to take any particles. Also note that the 「間」 may also be dropped here in less formal situations.

> 9ヶ月間ぐらいアメリカに住んでいます。

This should convey the idea that you have been living in the United States for
9 months, and still are.

Similarly,

> １年間ぐらい日本語を勉強しています。
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2015-09-22T22:34:08.403
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answer