How soon would you be (able to do something)?

You can politely ask someone when they can do something with the phrase "How soon would you be ___?" For example, ask a plumber to come to your house to fix a problem:

How soon would you be able to come out?

Or ask a coworker to send you a report:

How soon would you be able to send it to me?

Asking this way makes it clear that you want the action to happen soon.

This phrase appears in these lessons: