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����it��s no good sitting up too late. ��ҹû�кô���
����it is quite clear that he has read the book. ����ȼ���������Ȿ�顣
����it doesn��t matter what he says. ��˵ʲôû��ϵ��
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����1.��������look, seem, appear, happen, occur, follow�ȵ�����(���that�ӿ��as if�ӿ�)���磺
����it seems that he knows everything. ������ʲô��֪����
����it (so) happened that i had no money with me. ������û��ǯ��
����2.��ϵ���ṹ�����if ��when������״��ӿ�ʱ��ͨ����ϵ���ṹǰʹ����ʽ�����ʾ˵���˶�ij����ŀ������磺
����it was a great surprise to me when he did a thing like that. ��������ʹ�һܳծ���
����it would be a tragedy if anything went wrong. �������ʲô�¾���һ�����硣
����3.����if it were not for�� / if it hadn��t been for��(��������ϊ)���磺
����if it hadn��t been for the freezing wind they could have reached the injured man in time. ҫ�����д̹ǵĺ��磬���ǿͼ�ʱ�ϵ���ա�����ˡ�
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03-12
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