Ordering Food and Drinks

When you sit down at a restaurant, the waiter will eventually ask if you are "ready to order." Notice that we use the infinitive (to + verb) after the adjective ready.

Once you start ordering, you might want to customize your meal. If you want a sauce or dressing served in a separate little dish rather than poured directly over your food, the fixed phrase is on the side.

✅ Could I get the salad dressing on the side? ❌ Could I get the salad dressing by the side?

Another crucial detail is warning the staff about food allergies. The adjective allergic always pairs with the preposition to.

✅ My friend is allergic to peanuts. ❌ My friend is allergic with peanuts.

When grabbing a quick coffee or fast food, the cashier needs to know if you are staying in the building or taking the food away. The standard American English phrase is for here or to go. (In British English, you might hear eat in or take away).

✅ I'll have a muffin. — Is that for here or to go? ❌ I'll have a muffin. — Is that to sit or to walk?

Shopping for Clothes

When you enter a store, shop assistants will often ask if you need help. If you have a specific item in mind, use the phrasal verb look for.

Once you find something you like, you'll want to see if it fits your body. The correct phrasal verb here is try on.

✅ I love this blue coat. Can I try it on? ❌ I love this blue coat. Can I try it out?

Try out is used for testing equipment, software, or machines (like trying out a new phone or a car), but try on is strictly for testing the fit of clothing, shoes, and accessories.

Sales and discounts also rely on specific prepositions. When a price is reduced from its original amount, we say the percentage is off.

✅ All winter coats are 50% off today! ❌ All winter coats are 50% down today!

Paying at the Register: A Common Error

One of the most frequent mistakes English learners make is mixing up prepositions when talking about payment methods.

The general rule is that we use by for electronic, bank, or system methods, but we use in for physical paper money and coins.

✅ My card declined. Is it okay if I pay in cash instead? ❌ My card declined. Is it okay if I pay by cash instead?

While you might occasionally hear native speakers say "pay with cash" in casual conversation, in cash is the standard, most natural phrasing. Conversely, you pay by credit card, by phone, or by check. You never pay in card.