Differences between the uses of can and could

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- To show a learned ability, a continuing skill, or a natural characteristic. 1. After months of meditation, the witness can now speak about what he saw. 2. Can you speak French? 3. Pigs can cover a mile in about seven minutes when running at top speed.

- To express ability in the past. 1. At the age of six, the now-respected lawyer could already narrate a story before a group of people. 2. In the arraignment yesterday, I could hear the victim's family expressing their disappointment.

- To express a possibility or an opportunity. 1. By joining an organization, you can meet interesting people. 2. After beating all my deadlines, I can go somewhere for a vacation.

- To express a possibility or an option that is less definite, either now or in the future. 1. We could watch the debate on TV and discuss it later. 2. There could be a storm next week.

- Used in conditional situations. 1. The victim could win the case if justice is not blind.

- Used in unrealistic or exaggerated situations. 1. I am so angry I could throw him out of the window.