(1) I'm such a scatterbrain - I'm always leaving my umbrella behind.

(2) Mary is such a scatterbrain that she always forgets something.

(3) If you're a scatterbrain like me, you'll probably find this harder than you think.

(4) He is a scatterbrain.

(5) What a scatterbrain! She forgot to plug in the coffee-maker.

(6) Aunt Mary is such a scatterbrain that she always forgets something.

(7) The scatterbrain me might just forget to tell her if I leave it till tomorrow.