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/done /undertaking/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。 CASE SiteWatch™ Telematics helps you to often know the place Each and every equipment is, Operating standing and when maintenance or services is needed. Benefit from real ... https://case-study-help69950.jiliblog.com/93324975/top-guidelines-of-case-study-assignment-help