请帮忙看看这句子文法对不对！

Question

Up to now, our factory still have not found your assistant to look the stone.

Answer 1

此句有多处错误，都不知道怎么改，也无法判断原意。

不知道你是想找助手看石头还是找石头。

大概改成这样子吧，至少语法对，但是意思不知道是不是你的原意：
Up to now, our factory has not found your assistant to look for(at) the stone yet.
意思：直到现在工厂还没有找到你的助手来找（看）石头。

Answer 2

So far our factory staff still has not seen your assistant who should have examined the stone.

Answer 3

have--has
found--seen更好
to不要
look改为examine更好

参考资料：sername

Answer 4

基本没有