快速记忆：grand极重要的+father祖先=grandfathern. 祖父；始祖vt. 不受新规定限制Darwin was the grandfather of the theory of evolution.达尔文是进化论的鼻祖。

My grandfather used to drink a cup of green tea before he went to bed.我的祖父过去常常在睡觉前喝一杯绿茶。I love chatting with my grandfather on Sunday morning.我喜欢周日早上和我爷爷聊天。When I was young, my grandfather always used to take me hunting.当我小的时候，我的祖父母总是带我去打猎。