Can You Start a Sentence With “As”?

The use of "As" to start a sentence has long been a subject of debate among grammarians and language enthusiasts. Critics argue that it leads to unclear or incomplete sentences, while advocates claim it's a useful tool for elegance and emphasis. This article will delve into this topic, providing practical advice on when and how to use "As" at the beginning of a sentence.

The Role of "As" in a Sentence

"As" is a versatile word in English, functioning as a conjunction, preposition, or adverb depending on the context. As a conjunction, it is used to indicate causality or simultaneity. As a preposition, it denotes roles or functions, and as an adverb, it modifies and relates to the degree or manner of an action. "As" is commonly used to create comparisons, describe simultaneous actions, or convey a cause-and-effect relationship.

Instances Where Starting With "As" Works Well

Starting a sentence with "As" can create a smooth flow and add depth to your writing when done correctly. It works particularly well in establishing context, creating comparisons, or setting the stage for cause-and-effect scenarios. Here are some examples:

Sentence Explanation
As we walked, we talked about the future. "As" is used to express simultaneity.
As the CEO, I take full responsibility. "As" is used to express function or role.
As a child, I loved to play in the mud. "As" is used to establish context.
As she was late, we started without her. "As" is used to show cause and effect.
As cold as ice. "As" is used to create a comparison.

Instances Where Caution is Needed

However, starting a sentence with "As" can sometimes lead to confusion or ambiguity. This is often the case when the cause-and-effect relationship isn't clear, or when the context set by "As" is not directly related to the main clause. Here are some examples where caution is needed:

Sentence Explanation
As the sun was setting. This sentence is incomplete; it leaves the reader expecting more.
As a doctor, the car was expensive. This sentence is confusing; the context set by "As" is unrelated to the main clause.
As we know, the world is round. This sentence may be perceived as condescending as it assumes the reader's knowledge.
As you're here, let's start. This sentence can be ambiguous; "As" can be interpreted as "while" or "because".
As I said, I'm leaving. This sentence can be seen as repetitive or confrontational.

Tips for Using "As" at the Beginning of a Sentence

To use "As" effectively at the start of a sentence, ensure that it creates clarity rather than confusion. Make sure that the cause-and-effect relationship or the context set by "As" is evident. Avoid using "As" to start a sentence if it doesn't add any value or if it makes the sentence awkward or ambiguous.

Common Misconceptions and Myths

One common myth is that starting a sentence with "As" is grammatically incorrect. However, this is not true. "As" can be used to start a sentence as long as it connects logically and grammatically with the main clause.

  • Myth: "As" at the beginning of a sentence is always a sign of passive voice.

  • Fact: "As" can be used in both active and passive sentences. The voice of the sentence depends on the verb, not the conjunction.

  • Myth: You can't start a sentence with "As" in formal writing.

  • Fact: "As" is perfectly acceptable in formal writing when used correctly.


In conclusion, starting a sentence with "As" is not only grammatically correct but can also enhance your writing by providing context, comparison, or causality. However, it should be used judiciously to ensure clarity and coherence. Remember to keep the relationship between the "As" clause and the main clause logical and clear to avoid ambiguity or confusion.

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