Grammar students learn that am, is, are and helping verbs (for example, will, have, would) are often contracted with pronouns in both speaking and writing, as in I'm and I'll. But most students also find it helpful to know that in everyday spoken English these verbs are usually contracted with nouns and question words, too.
Here's a sentence about a man named Tom. Tom is a noun.
In writing, you will see
Don't worry. Tom will be here soon.
In speaking, you will hear
Don't worry. Tom'll be here soon.
Listen for Tom will again:
Don't worry. Tom'll be here soon.