since的用法和搭配
Topic: The Usage and Collocations of "Since"
Introduction:
The adverb "since" is commonly used in English to indicate a specific point in time, as a conjunction to introduce a reason or cause, or as a preposition to indicate the starting point of a period in time. This article aims to explore the various uses and collocations of "since" to provide a comprehensive understanding of this versatile word.
I. Usage as an Adverb:
As an adverb, "since" is used to refer to a specific point in time, often indicating when an action or event occurred. It can be used with a specific time expression to denote when something started and continues until the present moment. For example:
1. I have been working at this company since 2010.
2. She has been studying French since last year.
3. They have lived in this neighborhood since childhood.
II. Usage as a Conjunction:
"Since" is commonly used as a conjunction to introduce a reason or cause for an action or event. It is often followed by a clause that provides an explanation or an ongoing situation. Some examples include:
1. Since it was raining, we decided to stay home.
2. He couldn't attend the meeting since he had a prior commitment.include of 用法
3. Since she became a vegetarian, she has been more conscious of her food choices.
III. Usage as a Preposition:
As a preposition, "since" is used to indicate the starting point of a period in time. It often sig
nifies the duration of an action, event, or a state that continues until the present moment. Consider the following examples:
1. I haven't seen her since yesterday.
2. He has been absent from work since Monday.
3. We have been friends since childhood.
IV. Collocations:
"Since" can be collocated with various words and phrases to convey different meanings and contexts. Here are some common collocations:
1. "Since then": Used to refer to a specific point in time that follows a mentioned event or action.
    Example: He suffered from an injury and has been unable to play basketball since then.
2. "Ever since": Indicates that a particular event or action has had a continuous effect up until the present moment.
    Example: She fell in love with painting in college and has been pursuing it ever since.
3. "Since when": Used to express surprise or skepticism about a particular event or action.
    Example: Since when did you become interested in politics?
4. "Since a long time ago": Emphasizes the duration of an action or state that has been ongoing for an extended period.
    Example: They have been best friends since a long time ago.
Conclusion:
The word "since" can be used as an adverb, conjunction, or preposition to express different meanings and contexts in the English language. Whether indicating a point in time, introducing a reason, or marking the starting point of a period, understanding the usage an
d collocations of "since" is essential for effective communication.

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