過去完了・現在完了などについて教えてください。

質問

質問の意味は分かるのですが、応え方が分かりません。
自分なりに回答を考えてみました。どうか解説をお願いいたします。
１．What are you doing right now?　→I've been studying right now.
２．How long have you been?　→I've been studying for three hours.
３．What were you doing last night at nine o'clock?　→I had been studying last night at nine o'clock.
４．What time did you stop? →I had been stopped at 11 o'clock.
５．Why did you stop? →I had been finished.
６．How long had you been before you stopped?　→I had been stopped before for three hours.
７．What are you going to be doing at nine o'clock tomorrow night? →I will be have been studying at nine o'clock tomorrow night.
８．What time are you going to stop?　→I will be have stopped at 11 o'clock.
９．Why?　→ I will be have finished study.
10.How long will you have been before you stop?　→ I will be have stopped before three hours.

回答No.1

noname#17760 · ベストアンサー

基本的に、時制を合わせて答えます。現在進行に対しては現在進行で、過去完了に対しては過去完了で。そして、完了形は明確な過去のある時点を指すことができません。以下、一応回答例。

1 I'm studying right now.
2 I've been studying for three hours.
3 I was studying at 9 o'clock.
4 I stopped as 11 o'clock.
5 Because I wanted to watch TV.
6 I had been studying for three hours.
7 I'm going to been studying at 9 o'clock tomorrow night.
8 I'm going to stop at 11 o'clock.
9 I'm going to watch TV.
10 I will have been studying for three hours.

5と9 は止めた理由を聞いていますので、理由を答えてあげて下さい。

お礼

回答、ありがとうございます。
自分でも書き込んだ後で、時制が会ってない物があることに気づきました。
５．９は単に宿題が終わったからと考えましたが、こういう答え方があるのですね。
回答頂いたものをじっくりみて、自分がどこが混乱しているかを確かめたいと思います。
とても参考になり助かりました。本当にありがとうございます。