Here's why:
* "Such as" is a phrase used to introduce examples. It usually follows a noun or pronoun and provides specific instances of what was mentioned before.
* Sentences should have a clear subject and verb. Beginning a sentence with "such as" often leaves the subject unclear and can lead to a clunky sentence structure.
Here's an example of how to avoid starting a sentence with "such as":
Incorrect: Such as apples, oranges, and bananas, fruits are a good source of vitamins.
Correct: Fruits, such as apples, oranges, and bananas, are a good source of vitamins.
However, there are some exceptions where it might be acceptable in informal writing:
* When emphasizing a specific example: "Such as, the impact of climate change on agriculture is undeniable." In this case, "such as" is used to draw attention to a particular example.
* In lists or enumerations: "There are many different types of fruit, such as apples, oranges, and bananas." Here, "such as" is used to introduce a list of examples.
In general, it's best to avoid starting a sentence with "such as" and instead use alternative phrases like:
* For example...
* Including...
* Like...
* Specifically...