5． Inf的其它形式：
    1）將來式：
    主動(dòng)：be to do　
    被動(dòng)：be to be done　
    eg: China is to be one of the most important countries in the new
    century.
    * to be done & done的區(qū)別：
    the surface to be glaued 表將來
    the surface glwed 表完成
    2）完成式：
    主動(dòng)：to have done　
    被動(dòng)：to have been done
    表示不定式的動(dòng)作發(fā)生在謂語前
    eg: I am glad to see you again.　動(dòng)作同時(shí)發(fā)生
    I am glad to have seen his sons yesterday.　am glad表示現(xiàn)在的動(dòng)作 to
    have seen表示昨天的動(dòng)作
    3）The problem is easy to solve.
    The problem is difficult to carry out.
    在easy　difficult　hard　simple等形容詞后的不定式主動(dòng)表示被動(dòng)
    六、形容詞的比較級(jí)與級(jí)：（講義 P4 74-81）
    考點(diǎn)：形容詞的詞性混用，兩個(gè)近義形容詞的混用（small pressure→low
    pressure）(講義P22 92.5.36)，原級(jí)、比價(jià)級(jí)和級(jí)的混用，詞序問題。
    1．形容詞的比較級(jí)與級(jí)形式上的重復(fù)：
    eg: more sreater X
    most easiest X
    lesser…than X
    2．形容詞比較級(jí)與級(jí)的混用：
    ⑴more… of all +n(pl)/in the world/among…
    這里的more錯(cuò)，more→most
    ⑵most…than X → more…than
    eg: Pennsylvania has the more institutions of higher learning than
    any other state.
    ⑶常考的修飾比價(jià)級(jí)的詞：
    a little　a bit　slightly　far (more)　much (more)　still (more than)
    a lot (more than)
    eg: be much abundant in…X → very
    so much close to …X → very
    much&very：much修飾比較級(jí)，very修飾原級(jí)，不可以互換
    very/much…be　　 much attracted by…√