had look 还是 looked

had looked是过去完成时.指在过去的某个时候已经看到.
have looked是现在完成时.指直到现在已经看到.
looked是一般过去时.特指过去的某个时刻的"看"--这个动作.
had look语法错误.没有这种说法.

had looked. had look doesn't make sense. had to look is the correct way of saying it.

looked