Question

20．每天鍛煉一小時對你的健康有好處．
It is good for your health to do exercise for an hour every day．

Answer 1

分析 It is good．

解答 答案：It is good．結(jié)合句意這里表達(dá)的是客觀事實用一般現(xiàn)在時，表示對…有好處用be good for，這里用it作為形式主語，動詞不定式做真正主語，故答案是It is good．

點評 1）be good at 意為"擅長…"，后接名詞、代詞或ving形式．例如：

I'm good at playing chess．

我擅長下象棋．

2）be good with意為"靈巧的；與…相處得好"． 例如：

She is good with her hands．

她手很巧．

He is very good with the children．

他與這些孩子處得很好．

3）be good to意為"對…友好"． 例如：

My friend was good to me when I was ill．

我生病時我的朋友對我關(guān)懷備至．

4）be good for意為"對…有好處"．例如：

Eating more vegetables is good for your health．

多吃蔬菜對你的健康有好處．