这一句英语对吗?40分!

Your service had been provided a firm hands to thrive our business in past time,
你们的服务以前一直对我们公司的发展给予了很大的帮助

建议修改：
Your service has been a great help to our company's development.

have been 本身就有以前一直到现在的意思，不用再加past time

Your service to our company previously has been the development of a lot of help。

Your excellent service always gives us firm hands and helps us a lot on the development of our company.

Your services had been given intensive help to our company's development

In the past, your service had been given us firm hands to thrive our business.