…………… America, where is the home of the brave.(不只是，前面的名词，也可以来[概括]前面整件事情）, （如果是选项中有隔着这个名词比较远的，那还是优先选接近的）
……………..America, making the people love their country. （修饰前面所有内容。结果或细节）
但是 ….a place, which soothes my soul. 只能是 修饰前面的动词！！！
限定修饰和非限定修饰
语义上，非限定修饰只是提及一下，没有要求一定是这个范畴里面。1.Many environmentalists say that free trade encourages industry to relocate to countries with laws, mostly in the developing world, and that, in order to maintain competitiveness, rich nations have joined this downward slide toward more lax attitudes about pollution.
语义上，限定修饰一定要求在这个范畴里面。1.Many environmentalists say that free trade encourages industry to relocate to countries mostly in the developing world.
句子尾巴的 不定词片语： to do something
如果句尾里出现了 to do something…那么动作发出者一定是人或者事件。
…………..Harry……….., probably need to find a way to kill Voldemort (目的).
能主动某个行为，to do…
因果关系
因果关系：是不是 用对词了 because, 有没有用对时态，时态有没有反了。
If 虚拟语气, 时态平衡!!
The Organization of Petroleum Exporting Countries (OPEC) had long been expected to announce a reduction in output to bolster sagging oil prices, but officials of the organization just recently announced that the group will pare daily production by 1.5 million barrels by the beginning of next year only if non-OPEC nations, including Norway, Mexico, and Russia, trim output by a total of 500,000 barrels a day.
时间点是 1.OPEC HAD BEEN EXPECTED 2. ANNOUNCED 3是未来trim out
现在式… if 现在式
过去式 if 过去式
present simple before/// 过去式
过去完成式 whether (have Vpp)
当有虚拟语气的时候 if/whether 已经是假定，assumption 不能用would
补充一些虚拟语气的知识点：
1. 与现在的事实不符(本题情况)：
if S were, S would(should/could/might) + do…
2. 与过去的事实不符:
if S had done, S would(should/could/might) have done
3. 与将来的事实不符:
if S were to do, S would(should/could/might) do
if S should do, S would(should/could/might) do
if S 动词一般过去式(如果是be动词，只用were), S would(or should/could/might) do
4. 省略if(选项D情况):从句里，谓语动词含有should/were/had时，if是可以省略。
时态的marker就是时态的不一致，和连接词是否有表达逻辑关系，或前后关系。
if ______ , _________. if 和would 绝对不能放在同一个半句里面！！
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