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Subj(��иҹ) + Verb to be + V.ing
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�. �˵ء�ó�����ѧ��з������Դ����� "Past Continuous"
�. �˵ء�ó����Դ�á������� "Past Simple"
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-I was writing a letter when he entered the room.
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-While I was riding to school yesterday, I saw an accident.
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-When the postman came, I was studying English.
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The sun was shining when you went out.
The children were sleeping when you returned.
He jumped off the car while it was moving.
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�� Verb to be ���������㹻���¤���ҧ���˹�һ���¤
Was the sun shining when you went out ?
Were the children sleeping when you returned ?
Was the car moving when you jumped off ?
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�� not ���ŧ��ҧ��ѧ Verb to be ��� ��
The sun was not shining when you went out.
The children were not sleeping when you returned.
The car was not moving when he jumped off.
Verb to be ������� Was ��Ѻ��иҹ�͡����
Were ��Ѻ��иҹ��پ���
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