We can't go climbing. It's raining.
Why are you looking at your holiday photos?
What are you laughing at?
Is Steve writing an invitation card?
O.K. wait a minute, I'm getting up now.
Where's dad? He is is doing the last minute shopping.
Это время называется Present Continuous или Present Progressive, yпотребляется когда действие происходит в момент речи т.е. в данный момент.