点评问题：
1. 本文在2.1中提到了语法研究的两次转向，请概括并探讨其对型式语法产生的影响。
2. 本文在2.2中梳理了Sinclair和Francis的主要思想，请归纳概括。
3. 根据3.1中介绍的编码原则，试对以下explain例句归纳其不同的型式。
▷as, paint etc). The fax explained that Newton had the right
▷attempt to categorize or explain all the different types. I
▷cam said then went on to explain about the barman at the sta
▷e that problem. Can you explain how a baby boom in the Sixti
▷erwards he was trying to explain Britain’s thinking on the is
▷nchez: When Cavazos did explain his personal views, they usu
▷ne of them, Jon Knight, explained on arrival in London that
▷notherapist Paul McKenna explains: ‘After discussing what you
▷of view and he tried to explain it to his daughter as he to
▷onths. Dentists have to explain to their patients that they
▷original price. ‘Let me explain,’ I offered. The label, I su
▷rate a theory, and thus explain it to someone, by telling a
▷rs and mash for tea,’ he explained. A few years later it’s
▷s, she lied to you. She explained it to you on the basis th
▷undred yards long. Alex explained to me,’ said Barry,
▷use and blue jeans, was explaining why she thought that near
▷ven their big chance to explain what they’re about, unencumb
4. 下列为型式V of N的动词词项列表，请仿照3.22中的表2，归纳下列词项的意义组。
approve, beware, boast, come, complain, conceive, consist, daydream, despair, die, disapprove, dispose, drain, dream, hear, know, learn, partake, permit, reek, repent, smack, smell, speak, stink, talk, taste, tell, think, tire, warn, weary
5. 结合问题3和4中的亲手归纳，请对问题2中所概括的思想进行探讨，并给出你的一些结论性思考。
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