2016年职称英语卫生类考试句型学习：
To hear him talk...
结构：To hear him talk，+主要子句
说明：此句型意为“听某人谈话(的口气)…”。从形式上看，To hear him talk 似为不定式词组，但实则为含蓄条件句(即不用 if 直接引导)。To hear him talk 相当于 If you could hear him talk。
To hear him talk,you'd think he was Prime Minister.
听他谈话(那口气)，你会以为他是首相呢。
To hear you talk,I'd think you were Prime Minister.
听你谈话(那口气)，我还以为你是首相呢。
Without ...S + V ...
结构：Without …，+主要子句
说明：此句型意为“如果没有…”，是导致主要子句结果发生的必要条件。Without ... 为含蓄假设条件句，此用法在口语表达中最为常见。without 意为“(如果)没有…的话”。Without 既可以放在句首，也可以放在句尾，放在句首有强调作用。此外，如果主要子句用否定式，则和 without 构成双重否定，表示特别强调 without 之后项为主要子句动作发生之必备条件。
Without your help,I couldn't have done it.
(如果)没有你的帮助，我是不会做成的。(=If you hadn't helped me)
She can't solve the problem without his help.如果)没有他的帮助，她不可能解决这道题。
We can't live without air or water.(如果)没有空气或水，我们就无法生存。
Fish cannot live without water.(如果)没有水，鱼儿就无法生存。
What if/Say ...
结构：What if/Say+子句，S+V ...
说明：此句型意为“假设…”。What if 和 Say 用来引导一个假设条件句，其义相当于 Let us suppose(让我们假设)。
What if/Say he goes home before us and can't get in?What will he do then?
假设他在我们之前赶到家而又进不去呢?那他怎么办呢?
What if/Say you were to run out of money? What would you do?
假设你的钱用完了呢?你将怎么办呢?
