He came into the his bedroom and ___ his backpack on his desk

问题描述:

He came into the his bedroom and ___ his backpack on his desk
用 put 还是 putting,为什么?

put ( and 连接的两个动词时态要一致)��Ҳ��Ϊ�����ѡ�� ������ʦд�Ĵ��� putting ��ѧ��û�ҵ���ʦҲ��û�ʳ��һ����Dz�����ʦд���ˡ��������Ĵ𰸾��� put (�� came һ�£� ���û��and ���𰸾��� putting���ҵ�֪�� �����ؾ�����and��ôѡ���ǹ�ȥ��ʽ��put����