英語語法，學習和探索，張老師的語法理解，複合句中的省略when,while,though,if,as if, as though等後面，省略的詞多為它的主語和動詞be.
例句的話：Look out for cars when crossing the street.過馬路時注意車輛。
She talked while preparing their supper. 她一面做飯一面交談。
Though not large,the room was light and airy.房間雖不大，卻很亮堂，空氣新鮮。
Fill in the blanks with articles where(ver)necessary.在空格中填入必要的冠詞。
