展开全部 在but后何时要接带to的不定式，何时要接不带to的不定式有一条简单的规则。那就是前面动词是do（does/did/accomplished /accomplishing/to carry out）时，后接不带to的原形不定式；如前面用的是其他的动词，则后面的不定式要加上to。 Though the comparative advantage of industries in the nation is challenging to measure immediately, they can be inferred indirectly by observing their true expor... https://hbscasesolution28987.blogolize.com/5-simple-techniques-for-case-study-assignment-help-75889606