Quick Answer The plural of formula is formulas or formulae. Both are correct. Formulas is more common in everyday English. Formulae is used more in science and formal writing. One: This formula is easy to remember.Many: The teacher wrote three formulas on the board. Formula, Formulas, Formulae — See the Pattern Look at these words….
Quick Answer The plural of focus is focuses or foci. Both are correct. Use focuses in everyday English and foci in science or math. Focuses and Foci — See How They Work The word focus comes from Latin. That is why it has two plural forms. Look at these examples: Did you see the pattern?…
Quick Answer The plural of appendix is appendices (in books and documents) or appendixes (in medicine). Example: “The report has three appendices at the end.” Appendix, Appendices, Appendixes — See the Pattern Look at these sentences. Can you see what changes? Did you see the pattern? When you talk about one, you say appendix. When…
Quick Answer The word antenna has two plurals. Use antennae for the feelers on insects. Use antennas for TV, radio, and Wi-Fi devices. ✓ The bee uses its antennae to find flowers.✓ The roof has three TV antennas. Antennae or Antennas — See the Difference Look at these four sentences. Watch the word in blue….
Quick Answer The past tense of weep is wept. “Weeped” is wrong — do not use it. Use wept for the past and with have/has/had. Every day: I weep when I watch sad films. Yesterday: She wept after the bad news. Many times: He has wept during every sad movie. Weep and Wept — See…
Quick Answer The past tense of sit is sat. With “have,” “has,” or “had,” the form is also sat. Every day: I sit by the window. Yesterday: I sat by the window. Many times: I have sat by the window before. Sit, Sat, Sat — See the Pattern Read these sentences. Look at how the…
Quick Answer Sympathy means feeling sorry FOR someone — you care from the outside. Empathy means feeling WITH someone — you imagine yourself in their place and share the feeling. Both are kind; empathy is one step closer. Sympathy and Empathy — See the Difference Watch where the feeling happens — outside or inside: Did…
Quick Answer Apart (one word) means separated or away from each other. A part (two words) means a piece or a member of something bigger. ✓ She is a part of the team. (= a member) ✗ She is apart of the team. Apart vs A Part — See the Difference Look at these sentences….
Quick Answer An aisle is a path you walk through — like between shelves in a shop or seats on a plane. An isle is a small island. “She walked down the aisle at the supermarket.” “They visited a beautiful isle in the sea.” Aisle and Isle — See the Difference These two words sound…
Quick Answer The Oxford comma is the comma you put before “and” or “or” in a list of three or more things. It makes your sentence clearer. Without: I love my parents, Batman and Superman. With: I love my parents, Batman, and Superman. With and Without the Oxford Comma — See the Difference Look at…
