Is Starting a Sentence with 'For' in English Grammar Considered Incorrect?

No, it is not considered incorrect to start a sentence with 'for' in English grammar. English is relatively flexible regarding how we can begin a sentence. However, the usage of 'for' as a conjunction at the beginning of a sentence is more formal and may not be common in everyday speech or writing.

Contextual Connotations of 'For', 'Because', and 'Since'

Words like 'for', 'because', and 'since' have contextual connotations. In the following examples, 'for' is used to provide context and explanation:

For he knew it well that he had not prepared for his final examination in the way he might have done. For it is never too late to make a new beginning in one's life. For these parents are not proficient in English. For her demand is exorbitant. For the weather is inclement today. For you needn't know why you are going to that place, just go.

However, when 'for' is used as a conjunction, it does not lead a sentence. For instance: He felt sorry for he knew that he was late.

Using 'For' as a Conjunction

Using 'for' as a conjunction is very formal and often seen in literary or academic writing. It is not commonly used in everyday speech or writing. However, when it is used to give the reason for something that has already been stated, it can be appropriate. For example:

When I saw her in the river, I was frightened. For at that point the currents were dangerous.

Similarly:

Perhaps I should feel grateful for the hard work she has put in on my behalf. For she certainly has worked very hard indeed.

Usage Rules and Exceptions

Some authors of books on English grammar suggest that a clause of reason introduced by 'for' cannot come at the beginning of the sentence because 'for' suggests that the reason is given as an afterthought. For example:

The days were short for it was now December

However, 'for' can be used as a sentence connector to begin a sentence if it gives the reason for something that has already been stated:

For it was now December the days were short

In this case, 'for' is not introducing a new thought, but rather clarifying a reason that was previously mentioned or implied.

Conclusion

While starting a sentence with 'for' is generally acceptable, it is important to consider the tone and context of the sentence. Despite being considered less common in modern usage, using 'for' as a conjunction to explain a reason is still a valid grammatical practice, especially in more formal or literary writing.