I was about to leave when I noticed someone coming up the driveway.我正要出门，发现车道上有人走过来。As she was about to leave, she noticed that the kitchen window was open.她正要出门，发现厨房的窗户是开着的。The boss collared me this morning just as I was going out.今早当我正要出门的时候，被老板抓了个正着。