We use narrative tenses to talk about the past. We can use them to tell a story or to describe past events, including personal anecdotes. When we tell a story in the past, we often use linking words ...

Oil futures are financial contracts that allow participants to buy or sell a specific quantity of oil at a predetermined price on a future date. These contracts serve as an agreement between the buyer ...

We use the first conditional to talk about possible future situations (or ‘conditions’) and their results.We use if for things we think are likely to happen, and when for things we think are certain ...