We Keep Up With People on Social Media

stand by is a slightly different type of verb because by isn't an adverb, it's a preposition. With phrasal verbs with three parts, the object always comes at the end. So mary said that it's great to keep up with people on social media. That's correct. The correct sentence is, we keep up with each other by phone and email. And this time you can also say, a, i turned down it or b, i turned it down. There's more about this at b b c learning english dot com.