Is vs. Are—When to Use Each | Grammarly
https://www.grammarly.com/blog/is-vs-areCollecting phrases like a number of or a pair of can make it hard to choose between is and are. Which verb do you use when you’re talking about a number of people? On one hand, number is singular, which calls for is. But people is plural, which calls for are. Typically, it’s best to use are with a number of. You may occasionally run int…