1. certain [s rt()n] – 1. (a.) fixed, settled; 2. of a specific but unspecified character, quantity, or degree; 3. something is known or proved to be true; 4. certain that something will happen 5. you are certain or sure about something (you have no doubts about it)
1. They will get a certain percentage of the profit.
2. This old house has a certain charm.
3. It is certain that the sun will rise in the east tomorrow.
4. It is certain that Jane will succeed on the test.
5. I am certain that my teacher is right.
Note: Instead of saying that it is certain that someone will do something you can say that they are certain to do it or sure to do it:
1. The demand for this product is going up, and it is certain to drive up the price.
2. Rainy days are sure to go away soon.
Note: Instead of saying that it is certain that someone will be able to do something we often say that they can be certain of doing it or can be sure of doing it:
1. I chose this hotel so I could be certain of having the best service possible.
2. When you purchase from this company, you can be sure of getting a high-quality product.
2. curtain [k: tn] (n.) – 1. a piece of cloth that is hung to cover a window) (to draw/pull/close the curtains (= to pull them across the window so they cover it); 2. a sheet of heavy material that comes down at the front of the stage in a theatre (the curtain goes up/rises), (the curtain comes down/falls)
1. Janet opened her curtains and looked out.
2. My mother drew the curtains and switched the light on.
3. The curtain went up, and we saw six beautiful dancers on the stage.
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