Englishfor English speakers
excel
Verb
—
If you excel at something, you do it very well.
I excel at long-distance running.
The professor excels in his field of study.
add
Verb
—
If you add mathx/math to mathy/math, you put mathx/math and mathy/math together.
Cook for five minutes, then add the remaining spices to the soup.
—
If you add time, or price, you increase it.
A new kitchen would add value to the home.
We need to add five more waiters by next week.
—
If you add something to what you've said, you say something more.
I paused for a moment, then added, "Would you mind if I had some pudding?"
in
Preposition
—
Used to show that something is inside something else.
The cat is in the box.
—
Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
—
Used to show movement towards the inside.
The rain came in through the window.