Question

还有两个选择题，你也帮我分析分析吧

1.＿＿the doctor right away,he might be alive today.
A、Should he have gone to B、If he went to C、Were he to go D、Had he gone to
2、Busy ＿＿he is,he can fulfill the task ahead of schedule.
A、because B、as C、no matter how D、althought

Answer 1

1. D
翻译：如果（当时）他立刻去看医生的话，他今天/现在也许就还活着。
解释：句意明显提示，从句是对过去发生的动作的虚拟的条件状语从句，而主句则为对现在动作的虚拟，might be也是明确的暗示。
根据语法规定，if引导的条件状语从句如果是对过去的虚拟，则从句使用过去完成时。而且可以把助动词had提前，并省略if.
即：Had he gone to the doctor right away
= If he had gone to the doctor right away

2. B
翻译：尽管/虽然他很忙，他还是可以提前进度完成这项任务的。
解释：此题的从句采用了倒装句型。根据语法相关规定，如果as/though“尽管/虽然”引导让步状语从句，则可以把相应的表语/状语/谓语提前。
即：busy as he is = as he is busy
再如：Brave as/though he is, he is still a child.
= As/Though he is brave, he is still a child.

Answer 2

1.D-------------------虚拟语气的用法

2.B-------------------让步状语的一种表达方式

Answer 3

1.A虚拟语气，should倒装
2.B as必须倒装，硬记吧，adj+as的倒装结构