The British Isles（Reference for Teaching）

  that's what i think/was thinking.
  surely it must be…
  that's just how i feel.
  that's my opinion, too.
  so do(am, have, can) i.
③表示部分同意
  yes.you are right，but…
  i'm afraid you're right/it’s true.
  i'm afraid i have to agree.
  maybe/perhaps you're right.
  that's a possibility.
  i see your opinion.
  i hadn't thought of that.
 ④表示完全不同意
    h don't/can't agree(with you).
    i really can't agree(with you).
    i don't think you are right/that's right.
    i can't accept that.
    you must be joking!/don't be silly.
    you must be mistaken.
    no.you are wrong thinking that…
    ⅱdon't think so.
    ⑤表示委婉不同意 
    i'm afraid you are wrong.
    i'm afraid i disagree/can't agree…
    i'm sorry，but]don't/can't agree(with you).
    i'm not sure about that…
    i'm not sure i agree…
    i see what you mean.but…
    i thought it was good.but…
    i may be wrong.
    you could be right.but…
    2.形容詞三級前的冠詞使用情況歸納
    (1)原級
    ①泛指的單數名詞前用不定冠詞修飾，特指的名詞前用定冠詞修飾。
    e.g.this is an easy job.you can do it by yourself.
    joan jumped with joy at the good news.
    ②若單數可數名詞前有how, so, too，as時.不定冠詞應放在這些詞后，名詞前。
    e.g.how clever a boy he is!
    this is too small a room to live in.
    i don't think english is as difficult a language as russian.
   ③same必須和the連用
   c.g.men and women now get the same pay for doing the same job.
    ④形容詞前加the.表示一類人，謂語動詞用復數；表示一類事物，謂語動詞用單數。
    e.g.the young must respect the old.
    the rich are not always generous to the poor.
    the beautiful gives pleasure to au of us.
    (2)比較級
    ①根據上下文，省略了比較狀語.且形容詞后有名詞或替代詞one。形容詞比較級前用不定冠詞。
    the coat is a bit longer.give me a smaller one’ please.
    ②表示“兩者中一者比另一者……”時.比較級前用定冠詞the，常見句式有：