to knock one self out: to work very hard (sometimes too hard) to do somethingA reflexive pronoun must divide the idiom. Examples of TO KNOCK ONE SELF OUT She really knocked herself out trying to pass that difficult class. Don’t knock yourself out during practice. Save your strength for the competition later.

to be used to: be accustomed to Examples of TO BE USED TO He is used to taking snaps under center and is accustomed to a pro-style offense. I am used to using one hand to punch in names and send e-mails and text messages.

to wear off: to disappear gradually Examples of TO WEAR OFF Thankfully, most of the initial feelings of awkwardness wear off fairly quickly. It will wear off as we get older.

to cheer up: to make happier, to feel less sad Examples of TO CHEER UP We all tried to cheer up the little boy when he stared to cry. After the death of Deanne’s husband, it was difficult to cheer her up at all.

to fall in love: to begin to love Examples of FALL IN LOVE I don’t believe her when she says it’s impossible to fall in love more than once in your life; I do it all the time. I never wanted to fall in love, then I met you.

to take turns: to alternate, to change people while doing something Examples of TAKE TURNS The well-behaved children knew how to take turns on the swing set. The skiers had to take turns going down the slope.