Translate the following sentences into Japanese

[leonl]

I'm working my way through the first ten chapters of An:Introduction to Modern Japanese. There are not a lot , if any grammar points I don't understand in fact I'm really just learning the kanji and words this book introduces. I would really appreciate if someone could look over this exercise from chapter two. Sorry if this is asking too much

That wooden desk is my elder brother's
あの木の机は兄のです
My father's car is Japanese
父の車は日本のです
Is your mother a school teacher?
あなたのお母さんは学校の先生ですか
These are English flowers
これはイギリスの花です
These pencils are not my elder sister's
このえんぴつは姉のではありません
That boy over there is my younger brother's schoolfriend
あの男の子　は弟の学校の友達です
That girl is my younger sisters's friend
その女の子は妹の友達です
These televisions are not Japanese. They are British
このテレビは日本のではありません。イギリスのです
Is this picture yours?
この絵はあなたのですか
No, it's my grandfather's
いいえ祖父のです。
Whose glasses are they?
このめがねはだれのですか
They are Mr.Yamamoto's.
山本さんのです
Who is that man over there?
あの男の方はどなたですか
He is my younger sister's teacher.
妹の学校の先生です
What is that thing over there?
あれは何ですか
That is a Japanese writing brush
それは日本の筆です
それは筆です
Are these your keys?
これはあなたのかぎですか
Yes, they are mine.
はい、そうです
はい、私のです

[keatonatron]

この鉛筆えんぴつは姉のではありません

You've got 鉛筆 in there twice, once in kanji and once in hiragana

They are Mr.Yamamoto's.
山本のです

山本さんのです

Who is that man over there?
あの男の方はどなたですか

I think 男の人 would be much more natural. 方 is a more formal way to say 人, but it's usually used with more descriptive stuff, like 外国の方 or even かさを忘れた方. Especially because in this sentence you're talking about someone and not to them, which usually means you can relax the politeness just a little bit.

That is a Japanese writing brush
それは日本の筆です
それは筆です

Obviously the first one is better. 筆 isn't something unique to Japan, so maybe you should include 日本の.

Are these your keys?
それはあなたのかぎですか

Just a reminder: "these" = これ

Yes, they are mine.
はい、そうです
はい、私のです

Ooooh, very good! The first one is much more natural, and should be used in most situations. The second one is more of a literal translation, or perhaps something you would say when it's really important as to whose keys they are, and you want to make sure there is no misunderstanding.

Great work!!!!

[leonl]

Thanks for your time and all the help keatonatronさん。 About 人 vs 方 this book hasn't introduced 人 yet so I'm using 方 the word it has introduced , though through previous classes I have learned that 人 is more natural.

[keatonatron]

That is strange 方 is quite an advanced concept, yet 人 is one of the basics.

[leonl]

That is strange 方 is quite an advanced concept, yet 人 is one of the basics.

Didn't know that . Chapter three or four introduces the reading jin but hito doesn't look like it's coming up for a while.

P.S. I switched to a computer that I can't use IME on right now

[keatonatron]

Chapter three or four introduces the reading jin but hito doesn't look like it's coming up for a while.

Well, do yourself a favor and remember it