1.would you please leave him a message.请问 leave him a message是双宾结构吗?

1.would you please leave him a message.请问 leave him a message是双宾结构吗?
2.我们的学校比他们的学校大两倍.汉译英：our school is two times larger than their school.our school is twice larger than their school.请问这两种表达都对吗?答案是后面的一句.
3.how about rowing a boat in the park?应该是on the park吧.