There are circumstances under which any of the four examples can be used either with or without "the". "the" simply indicates, as always, that the speaker has a specific group of people in mind, either because they have already been mentioned earlier in a conversation or text or because it's obvious to the listener or reader which group is being referenced. There is nothing special about the use of "the" (or not) in these examples.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
CalifJimThere are circumstances under which any of the four examples can be used either with or without "the". "the" simply indicates, as always, that the speaker has a specific group of people in mind, either because they have already been mentioned earlier in a conversation or text or because it's obvious to the listener or reader which group is being referenced. There