worth, worthy, worthwhile用法區(qū)別fit,match,suit的區(qū)別medicine,drug的用法區(qū)別area, region, district的用法區(qū)別needn’t與mustn’t 的用法區(qū)別admit和admit of 的用法區(qū)別can和be able to的用法區(qū)別enjoy的用法continue與go on用法區(qū)別不定式被動(dòng)式作狀語的用法check in和check out比較when, while與as的用法區(qū)別be easy to do sth 的用法Mean的用法詳解familiar的用法大全fool與foolish的用法sure與certain的用法區(qū)別so far的用法歸納had better 的用法歸納fun和funny作形容詞的區(qū)別