主動形式表示被動意義
    1)wash, clean, cook, iron, look, cut, sell, read, wear, feel, draw, write, sell, drive…
    The book sells well.這本書銷路好。
    This knife cuts easily.　 這刀子很好用。
    2)blame, let(出租), remain, keep, rent, build
    I was to blame for the accident.
    Much work remains.
    3) 在need, require, want, worth (形容詞), deserve后的動名詞必須用主動形式。
    The door needs repairing.= The door needs to be repaired.
    This room needs cleaning. 這房間應(yīng)該打掃一下。
    This book is worth reading.　這本書值得一讀。
    4) 特殊結(jié)構(gòu)：make sb. heard / understood (使別人能聽見/理解自己)，have sth. done ( 要某人做某事)。