Would you check my questions about "must" and "had to" ?

Dear native English speakers,
would you check my questions?

You must go there. は、ほぼ命令なので、命令文で Go there. と言ってもほとんど同じ意味です。
同じく You must not go there. は Don't go there. とほぼ同じ意味です。

１ 次の文を、ほとんど同じ意味の、命令文に書き換えなさい。
①You must help your mother.

②You must study English harder.

③You must not go to the park.

④You mustn't go shopping now.

「～しなければならなかった」は、mustに過去形がないので、have to ~の過去形の had to ~を用います。

２ 日本語に訳しなさい。
① This morning I had to take a taxi to work because I got up late. (take ~ =~に乗っていく)

② While I went to high school, I had to get up at six.

３ ( )の指示に従って英語に訳しなさい。
①私達は、毎日歩いて学校に行かなくてはなりませんでした。(weで始め、8語で)
①We had to walk to school every day.

②私達は、みんな、学校で日本語を勉強しないといけなかった。(all , at schoolを用いて8語で)
②We all had to study Japanese at school.

③今、宿題をしなさい。[｢宿題｣には｢あなたの｣を付ける](You must を用いて6語で)
③You must do your homework now.

④トムの家に行ってはいけない。(must, house を用いて7語で)
④You must not go to Tom's house.

⑤君は、お昼の12時までに大阪に着いていなさい。(must, in, by を用いて7語で)
⑤You must arrive in Osaka by noon.

⑥君は、昨日、そんなに(so)早くここに来なくてもよかった。(didn'tを用いて9語で)
⑥You didn't have to come here so early yesterday.

⑦私は、毎日、母の手伝いをしなくてはいけなかった。(my を用いて8語で)
⑦I had to help my mother every day.

⑧あなたは、自転車で仕事に行かなくてはならなかったのですか。(go to work を用いて９語で)
⑧Did you have to go to work by bike/bicycle?

⑨あなたのご両親は、東京に引っ越さなくてはいけなかったんですか。(move to を用いて8語で)
⑨Did your parents have to move to Tokyo?

That's all.

Thanks in advance.

Hirashin

Seems to be OK, though with the limit on the number of words, students may have problems if they try to write twelve o'clock rather than noon (or midday).

Thanks for the help, Lothor.