求英语高手〜这句话对不对

问题描述:

求英语高手〜这句话对不对
I am writing to thank you for your help,which increased 20% sales last month

不对.错句.
i am writing to you for your help,whith which we increased 20% sales last month.谢谢!你的这种写法肯定是对的,我只是突然想起我提问的这句话,想知道help是不是不能作主语?help 作为抽象概念是可以做主语的。也可以作宾语。比如:i need your help.宾语 youe help is great.主语在您的句子里,help这个先行词需要介词。 we increased ........with your help.