This sentence refers to the individual efforts of each crew member. The Gregg Reference Manual provides excellent explanations of subject-verb correspondence (section 10:1001). Mancini, S., Molinaro, N., and Carreiras, M. (2013). anchoring coherence in understanding. Long. Linguist. Compass 7, 1-21 doi: 10.1111/lnc3.12008 Abbreviations and acronyms usually adopt a singular verb. If you are not sure, check that the full version of the acronym or abbreviation is a singular, plural or collective accessory and refer to the rules above. The most important thing is to use some form of agreement consistently. Have you ever received „subject/verb“, like an error on a paper? This handout will help you understand this common grammar problem…