outdoors既可以是副词,也可以是名词.这里是名词;be +adj;n
adv.在户外;向户外
n.户外;露天;野外;
第二个问题; 第一句正确.第二句错误,因为ago,和过去式连用,表示状态用 for three years;
He has been here for 3 years.
outdoors既可以是副词,也可以是名词.这里是名词;be +adj;n
adv.在户外;向户外
n.户外;露天;野外;
第二个问题; 第一句正确.第二句错误,因为ago,和过去式连用,表示状态用 for three years;
He has been here for 3 years.