A preposition is a type of dog. They don't go in the beginning of the sentences
You should use the word "I" when it is the subject of a sentence, and the word "me" when it is the object of a sentence or of a preposition. "I want you to understand me." "I want you to listen to me."
The preposition at is used before an object of the preposition in a sentence. It should not be used at the end of a sentence. Examples: "I was at the store." - Correct (store is the object of the preposition.) "Prepositions should not be used at the end of a sentence." - Correct (end is the object of the preposition that goes with at.) "Where is my phone at?" - Incorrect Instead, one would say, "Where is my phone?"
When you are beginning a list of irregular items
The preposition is fine. However, the question technically should read: Does this sentence use a preposition properly? Connor waited in line while Ava parked the car.
I walked to the shop
Yes, it is possible to start a sentence with a preposition, although it is usually considered more informal or conversational. Some examples include: "At the end of the day, it all comes down to hard work" or "On the whole, the project was a success."
you use a preposition usally at the end of a sentence.
The noun or pronoun at the end of a prepositional phrase is the object of the preposition.
Here is preposition used in a sentence. Adverb phrases use a preposition to tell what, when and how an action can occur.
Nouns, pronouns, gerunds, and noun phrases can commonly stand after a preposition in a sentence.
We might see you after the movie.
There is a ball under the bed.