1. Let's join a rowing club.
我们加入划船俱乐部吧。
还能这样说：
Why not go to join a rowing club?
What about joining a rowing club?
谚语：
To look one way and row another.
声东击西。
2. We shall go boating on the lake on Sunday.
我们周日要到湖上去划船。
还能这样说：
We will row a boat on the lake on Sunday.
We intend to go boating on the lake on Sunday.
应用解析：
Lake Victoria 维多利亚湖;
the Great Lakes 五大湖;
by the lake 在湖畔;
the Lake District 湖区
3. You must learn to row.
你要学会划船。
还能这样说：
Can you row a boat? If not, you'd better learn it.
You'd better learn how to row a boat.
谚语：
Fools learn nothing from wise men, but wise men learn much from fools.
愚者不学无术，智者不耻下问。
4. May I have the use of your cockboat?
我可以借用一下您的小艇吗?
还能这样说：
Would you be kind to lend your cockboat to me?
Can you lend me your skiff?
应用解析：
be of great use 非常有用;
use sb. well 对人好;
use care 小心;注意;
use economy 节省;
in use 正在用;通用