"Since" is a versatile word in the English language, often used to indicate a point in time in the past from which something has continued to the present, or to introduce a reason or cause. Here are some common uses of "since":
1. Point in Time: It is used to refer to a specific past event or time from which something has continued to the present.
Example: "I've lived in this city since 2000."
2. Duration: To express how long something has been happening.
Example: "It has been raining since this morning."
3. Reason or Cause: "Since" can introduce a reason or cause for an action or event.
Example: "I'm late since the train was delayed."
4. Background Information: To provide background information about why something is happening.
Example: "Since you've never tried yoga before, let's start with the basics."
5. Contrast: To show a contrast between two things or situations.
Example: "I used to be a teacher, but since I started working in marketing, my life has changed."
6. As a Conjunction: It can also act as a conjunction, linking two clauses.
Example: "Since it's raining, we should take an umbrella."
Remember that "since" is often followed by a past tense verb to indicate a past event or action, and by present perfect verbs to indicate a past event with present implications.