Why would my Ford Taurus just shut off when i put it in gear?

Why would my Ford Taurus just shut off when i put it in gear?

Get the codes read. Mostly due to the car having no power due to ignition or fuel delivery problems. Torque converter can also be locking up.

There could be at least a dozen reasons why it might STALL, but it would only "shut off" if there was a faulty ignition switch or if you turned the key to the off position. I recommend that (a) you have it properly diagnosed if it happens repeatedly, and (b) you learn the correct terminology so you don't sound like such a clueless dope.

That will happen if you started it with a remote and didn't put the key in the ignition