Trying to analyse it, I have to conclude that since et al means "and others" that I ... plural is more heavily used, and much more with "...et al have" vs "...et al has".
Feb 4, 2011 ... Third on the list is the usage of et al. Given the level of detail in these style rules, it's no surprise that many find them challenging. Here are three ...
May 25, 2016 ... “Et al.” is a scholarly abbreviation of the Latin phrase et alia, which means “and others.” It is commonly used when you don't want to name all ...
Keep using etc. instead of et al.? Check out Ginger's spelling book and make sure you never confuse etc. and et al. again!
It is important to use these abbreviations literally and to punctuate them correctly. Many writers confuse "e.g." and "i.e.," and many type "et al." improperly or do ...