Student or Learner
"Ken is sick and can't go to NewYork"
"Have John go instead"
I don't know when we can use the second sentence'structure and the rules of using it.
Is there any short form similar to this?
to tell or arrange for sb to do sth for you: [vn inf] He had the bouncers throw them out of the club. (informal) Iíll have you know (= Iím telling you) Iím a black belt in judo. [vn + adv. / prep.] Sheís always having the builders in to do something or other.
Merriam-Webster's Learner's Dictionary
to cause, tell, or ask (someone) to do something
▪ Have her call me [=tell her to call me on the telephone] when she gets back.
▪ Have my assistant schedule another appointment for you.
▪ You should have someone check that out for you.
▪ She's having the children stay with us for the weekend. [=the children are staying with us for the weekend because she wants them to]
▪ He had the barber cut his hair short. [=he got the barber to cut his hair short] ▪ What would you have me do? [=what do you want me to do?]
▪ They would have us believe [=they want/expect us to believe] that all these problems can be fixed by raising taxes.