What we need to do is 后跟 "What we need to do is verify their nuclear declaration and we have put together a protocol that's based on international standards," Hill told reporters late Friday."I think there's a lot of support within the six-party

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What we need to do is 后跟
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What we need to do is 后跟 "What we need to do is verify their nuclear declaration and we have put together a protocol that's based on international standards," Hill told reporters late Friday."I think there's a lot of support within the six-party
What we need to do is 后跟
"What we need to do is verify their nuclear declaration and we have put together a protocol that's based on international standards," Hill told reporters late Friday."I think there's a lot of support within the six-party process for getting this done."
系动词 is 后面似乎应该跟ing 或 to,但凭直觉似乎原型很合适.谁能解释一下这里为什么用原型?省略了to的不定式还是什么?
省略了to吗？为什么要省？语法上怎么解释？

What we need to do is 后跟 "What we need to do is verify their nuclear declaration and we have put together a protocol that's based on international standards," Hill told reporters late Friday."I think there's a lot of support within the six-party
应该是省略了to ,因为do前有to,此种情况下is后的to要省略,这是一种语法现象.

What we need to do is (to) verify their nuclear declaration
What we need to do is (verifying) their nuclear declaration
What we need to do is (verification of) their nuclear declaration
不能省略to,原句错误

what i need to do what need i do? What do we need to take photos? what need we do= need we what to do 吗? What do we need to make p_____?A popper,I think.12345,54321, 英语改错 what else things do we need to buy what we need to do is just work What do we need to cut a meat 怎么翻译 What do we need to take photos?怎样回答 What do I need to give to touch your heart? what we need和what do we need区别 what i need to do what i can to do?语法正确吗? 英语翻译( )25._____ is enough time to do our work well .A.We all need B.All we need C.We need all D.What we need to I need to know what do you want for all? what do i need to take with me?什么意思 what do i need to take with me what marriage do i need What do you need?We need a P.E.teacher to volleyball and swimming. 一个英语连词成句题,need ,we ,to ,time ,do ,do ,what ,like ,wo ,to