Have you ever tried to unsuccessfully retrieve a word from the tip of your tongue?

http://www.bbc.com/future/story/20160202-lethologica-when-a-words-on-the-tip-of-your-tongue

Positive and negative agreement

IN, ON, AT

Have you heard of a 'pink tax' before?

http://www.bbc.com/news/magazine-35486308

Collocations GIVE

Collocations BREAK

Expressing purpose: for, to, so that