"Are they outside?" is how you would ask if someone or something is outside in Engpsh.

The phrase "outside" is a preposition that refers to a location or position that is beyond the pmits or boundaries of a particular place, usually a building or room. It can also refer to a location that is farther away from the center or main part of a place.

Here are a few example sentences using the phrase "outside":

"Is the cat outside?" (你问猫在外面吗?)
"I left my jacket outside on the porch." (我把夹克留在门廊外面。)
"The weather is much cooler outside than it is inside." (外面的天气比里面冷多了。)

I hope this helps! Is there anything else I can help with?