correction: How can I use "to" and "for" in a sentence? "To" is a preposition. Use "to" for expressing direction, place, or position. Example, I am going to the store Also, To" can be used when you're doing something in the direction of something or someone, Example: "I am speaking to your friend" For talks about the conditions that led to the determination Example, "Here, I'm giving this for you."

If I'm understanding your question correctly, you could say, A sentence with "to" "I am going to the store." A sentence with "for" "I am waiting for my friend" "To" is used to explain distance or that something is to move from one location or another. "Please give this to him, or I am going to work." However, it could also be said "I don't want to do that" Or if someone asks "Do you want to eat something" and you answer "No, I don't want to" The verb is "eat" so when you answer the question, it is understood without needing to repeat the word "eat" in your answer. It isn't wrong to say "No, I don't want to eat." but most people will just say "No I don't want to" "For" indicates something that is to be used with something else. "This toothbrush is for my teeth" or it can be used to indicate a goal or intent. "He offered help for his friend" or it can be used to indicate a place someone is going. "he is headed for Mexico" which is another way of saying "he is going to mexico" Hopefully this helps?

This is a huge question. Could you be more specific? What kind of sentences would you like to write? Perhaps you could write some sentences and we could give feedback on correct usage.