英語は上手ですね！ とこどき他の使える言葉を書きます。"[ ]" は随意の意味です。

What book is good for children? 他の話し方は: "What are some good children books?

^この文法を使い方の例えば："John reads lots of books." ->動詞が変わらない -> "John reads lots of books well"

More Examples: "Alice takes classes", "Bob runs marathons", "Alice studies well", "Bob runs poorly"

It's [already] the second time he's read Harry Potter. He is 9 years old.　アメリカ人は「もう (already)」とよく言っているし、それもあまり無礼じゃないのです。

What book is good for him? 他の話し方は: "What would be a good book for him [to read]?" or "What books would you recommend for him?" or "Do you have any books you would recommend he read?"

"would be" の文法について：食べ物を注文している時、「何かおすすめがあるんでしょうか」= 「What would be your recommendation?」=「What would you recommend?」(最後の例えばが一番いい）

^この文法を使い方の例えば：
He is understands very simple English. << 上の文法例えばに、"He understands simple English"の種類の文を見てくださいね

He [particularly] likes comedy.  （「特に、コメディーが好き」）

He enjoyed Home alone in Japanese before. << "He also enjoyed watching the Japanese version of Home Alone"

頑張って続けてくだいさいね！！

What book is good for children?

Hello! I teach English to children on italki. If he can read "Harry Potter" I recommend you try "The Hunger Games" series, "the Chronicles of Narnia" or "the Golden Compass" but if you want more simple English, I recommend books by the author Jacqueline Wilson, Sean Taylor or Roald Dahl.

I hope that helps!

What book is good for children?

My son likes to read.
He read very quick and understand well.

He reads fast and at the same time he can understand it well.

Last week,he was reading HarryPotter again.

It is second time he read that.Now he is 9.

He already read that book twice and now he is nine years old.

What book is good for him?

He is understand very easy English

He can easily understand English

Today, we watched Tom and GerryJerry  on yturb Youtube.
He likes comedy.

He enjoyed Home alone in Japanese before.

Try to buy books about science like plants, animals and their habitats. I think he will like it. :)