爲什麽impact 要用have?

你的問題沒道理，網路上隨便找一下便可找到如下四句足可證明”bring a negative impact”是一個正常普遍用法
1."I am sure the road will bring a negative impact on the rich culture and tradition of Mustang. But the people of Lo need the road. Now is not the time to point out the good and the bad. We shall see in time," says the last king of Mustang [Al Jazeera]
2. … now and we don't want to get to ahead of ourselves," Bennett said "The last thing that we want to do is bring a negative impact to the community." There are no other egg complex's in the immediate area. The planned facility requires a special use ...
3. He said the operation of the platform will bring a negative impact to some 1,000 STA members in the State. "Uber is currently recruiting 'cabbies' for the purpose," said Hiew, who is STA Sandakan Branch Chairman.
4. I think that is an example of how progress has brought a negative impact. If we can set limits on it, and agree to those limits, that would help a lot.