原创教案、课件每篇1元-20元
分词作时间状语,如果先与主动词的动作,且强调先后, 要用having done。如:
Having answered the letter, she went on to listen to the radio.
Having been criticized by the teacher, Li Ming gave up smoking.
注意:如果是否定句,not 一般放在句首,如:
Not having received his reply, he decided to write again.