⑧由特殊的句式结构来判断空格应填的词。
(1)由it is…that…强调结构形式，判断填it还是that。
[例10] …and 40 was only after I heard she became sick that I learned she couldn’t eat MSG (味精)! (广州一模)
解析：由句式结构可知，本句为强调句，应填it。
(2)由倒装句式判断，是填构成倒装的条件的only, so, neither, nor, never, hardly, seldom, not, until, had等，还是填do, does, did等。
[例11] _______with hard work can you expect to get pay rise.
解析：由can you expect to…可知，这是倒装句，根据构成倒装的条件可知，应填副词only，因为“only +状语(with hard work)”放在句首，句子要用倒装。
(3)由it作形式主语或形式宾语的句式判断，空格处是否填it。如：
[例12] …as 32 took them just three minutes to steal paintings by two world-famous artists… (2008年佛山二模)
解析：由句式结构可知，这是it takes, sb. some time to do sth.句型，本句的不定式to steal paintings是真正的主语，空格处填形式主语it。
[例13] Dating sites also make 36 easy to avoid someone whom you are not interested in. (2008年惠州二模)
解析：由句式结构可知，to avoid…是真正的宾语，easy是宾补，空格处应填作形式宾语的it。
4)so /such…that…句型。如：
[例14] This made the goat so jealous___34___it began plotting against (谋划对付) the donkey. (2007年惠州二模)
解析：由句式结构可知，这是so…that…句型，应填that。
(5)more…than… (与其说……不如说……，比……更……)句型。
[例15] Cynthia’s story shows vividly that people remember more how much a manager cares 40 how much he pays. (深圳宝安期末)
解析：由句式结构可知，这是more…than…句型，故填that。句意是与经理所给的报酬相比，雇员更铭记于心的是他的关心。
例17] That was definitely not an attractive idea so I politely declined her invitation, 40 (close) my book and walked away. (2008年广州一模)
解析：虽然句中已有谓语动词declined，但由and walked可知，所填词与declined和walked是并列关系，所以也用一般过去式closed。
[例18] In Logan, three people __38__ (take) to a hospital, while others were treated at a local clinic. (梅州二模)
解析：因主语three people与take是被动关系，即三个人被送进医院，故用被动语态；由were treated可知，要用一般过去时，故填were taken。
若句中已有谓语动词，又不是并列谓语时，所给动词就是非谓语动词。若是非谓语动词就要确定用—ing形式、—ed形式，还是用不定式形式，确定的方法主要有：
(1)作主语或宾语，通常用—ing形式表示习惯或一般情况，用不定式表示具体的情况。
[例19] …but it is not enough only 35 (memorize) rules from a grammar book. (佛山一模)
解析：因it是形式主语，后面用不定式作真正的主语，故填to memorize。
[例20] _______ (speak) out your inner feeling won’t make you feel ashamed, on the contrary…
解析：句中已有谓语won’t make，所以speak应为非谓语动词；谓语前面应为主语，作主语，表示一般情况，要用动名词短语，故填Speaking。