精品丰满熟女一区二区三区_五月天亚洲欧美综合网_亚洲青青青在线观看_国产一区二区精选

  • <menu id="29e66"></menu>

    <bdo id="29e66"><mark id="29e66"><legend id="29e66"></legend></mark></bdo>

  • <pre id="29e66"><tt id="29e66"><rt id="29e66"></rt></tt></pre>

      <label id="29e66"></label><address id="29e66"><mark id="29e66"><strike id="29e66"></strike></mark></address>
      21.9 had better表示"最好"
      ?
         had better 相當(dāng)于一個(gè)助動(dòng)詞,它只有一種形式,它后面要跟動(dòng)詞原形。
         had better do sth
         had better not do sth
         It is pretty cold. You'd better put on my coat.
         She'd better not play with the dog.


         had better have done sth表示與事實(shí)相反的結(jié)果,意為 "本來(lái)最好"。
         You had better have come earlier.
       


















       學(xué)習(xí)啦--英語(yǔ)語(yǔ)法大全