There is no post office around. 附近没有邮局。(副词) They all rushed over, eager to help.他们都跑了过来,急于要帮忙。(形容词) We learn to swim by swimming. 我们通过游泳学游泳。(介词) I shall stay another five months. 我将再呆五个月。(名词词组) ...