draw aconclude造句

We don’t have to conclude… = We don't have to draw a conclusion…
后面的that 从句是同位语从句，conclusion是 our efforts have all come to nothing，就是我们不必做that从句中的这样一个总结。

retrrr6drawaconclude

conclude
conclude[简明英汉词典]
[kənˈklu:d]
vt. & vi. 结束
vt. 1 得出结论; 断定 2 决定

应该是
draw a conclusion
得出结论,告一段落

I find it difficult to draw a conclusion on that.
我觉得此事难下结论。

We'd better lay our heads together before we draw a conclusion.
在下结论之前我们最好是一起讨论讨论。