Lesson 27 aisle align rhythm crumbs fasten glistened knotty knuckle often plumber reign bustle shepherd soften sword thistle knock wrestle wrinkled yolk Challenge Words: rendezvous rhinoceros choreograph raspberry handkerchief Grammar: Contractions -Contractions are words made by combining two words and omitting some letters. An apostrophe replaces the missing letters I am= I’m You are= you’re She is or has= she’s They are= they’re I have= I’ve You have= you’ve He had= he’d They had=they’d We will= we’ll You will= you’ll She would= she’d They shall= they’ll