Better sentence-writing in 30 minutes a day - Dianna Campbell 1995

Contractions
Apostrophes
Revising at the word level

Using apostrophes to make possessives is challenging for some students, but using them for their other purpose—making contractions—is easy.

A contraction is a shortened form of two words, and contractions are usually acceptable in informal speech and writing. (We use them freely in this book.) The only thing you have to remember is that the apostrophe is placed at the spot where one or more letters have been omitted. For example, I am becomes I’m, and you have becomes you’ve.

Make contractions of the following pairs of words:

Correct your answers by consulting a dictionary.