Learn Spanish (Latin America): Ya que es de algodón, se me encogió la camisa en la secadora. - Since it is made of cotton, my shirt shrank in the dryer.

In Spanish, when something happens accidentally or out of your control, you use the accidental se construction. Instead of saying you shrank the shirt directly, you structure it as if the shirt acted on its own (se encogió, it shrank) and you are just the indirect victim (me, on me). This takes the blame off you!

Why is the verb encogió in the third-person singular instead of the first-person?

In the accidental se structure, the item that underwent the accident is the actual grammatical subject. Since la camisa (the shirt) is the subject here, the verb encogió must conjugate to match it in the third-person singular.

Why does it say la camisa instead of mi camisa if it is my shirt?

Because the indirect object pronoun me already tells us who is affected by the action. Once you use me, Spanish doesn't need to repeat the ownership with mi. Using the definite article la is the natural way to phrase this when personal clothing or body parts are involved in this structure.

Could I use porque instead of ya que at the beginning of this sentence?