Replace toothbrush every three months.

Meaning: This means you should get a new toothbrush every three months to keep it clean and effective.

Choice of Words: Replace means to put something new in place of something old. Toothbrush is a small brush with bristles used to clean teeth. Every means each one of a group of things. Three is a number. Months are periods of time equal to about one-twelfth of a year.

Alternative Expressions

Related Expressions

• Replace smoke alarms every ten years.
• I visit the dentist every six months for a checkup.
• Visit dentist every six months.
• Replace comb when worn, lose teeth.
• Replace worn washers.
• Replace batteries.
• I use a soft-bristled toothbrush to clean my teeth.
• I put a pea-sized amount of toothpaste on my toothbrush.
• She used a soft toothbrush and toothpaste.
• Use a soft-bristled toothbrush.