【1】The two men【主语】// were locked【谓语动词】// in combat【状语】, //that is , in a fight to the death【补充性状语】.
备注(1):that is换句话说相当于in other words或者相当于namely即
备注(2):be locked in 陷入/卷入(搏斗/困境/争论/争执之中等)
【2】She【主语】// makes 【谓语动词】efforts【宾语】 to do exercise【后置定语】 so that she can keep fit【目的状语】.
备注(1):make efforts to do sth=make an effort to do sth 努力做某事。
备注(2):so that 以便于,引导目的状语从句。
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