You should think it clearly whether he is eligible for the job.有无语法错误
问题描述：
You should think it clearly whether he is eligible for the job.有无语法错误
答
非常正确啊。
答
think在此处不能作及物动词，改为think it over较好，意思为仔细考虑，这样clearly就不需要了。
You should think it over whether he is eligible for the job. 没别的问题啦！
答
我觉得应该在whether前加上that更好.
You should think it clearly （that）whether he is eligible for the job.
因为你要考虑清楚的事情是他是否胜任工作,think后面it作宾语,但是it指代的是whether he is eligible for the job.,所以应该在这句话前加上that,用以引导这个句子.
答
去掉it.
You should think clearly whether he is eligible for the job.