Yes, you can start a sentence with the word ‘for’. In English, starting a sentence with ‘for’ is acceptable, particularly when it is used to introduce an explanation, reason, or a specific context related to the previous sentence.
For example, consider the following sentences: ‘He didn’t attend the meeting. For he was feeling unwell.’ In this case, ‘For’ connects the reason for his absence back to the first statement.
Using ‘for’ at the beginning of a sentence can lend variety to your writing and help clarify your points. However, it’s essential to ensure that it smoothly integrates with the surrounding context and maintains the coherence of your message.