Hola Claire, Tanto FOR como SINCE se utilizan con el presente perfecto: We use FOR and SINCE to say HOW LONG something has been happening. Ex. I have been waiting FOR two hours. I have been waiting SINCE 8 o´clock. Cuando gustes, Silvana

Hola Claire, Tanto FOR como SINCE se utilizan con el presente perfecto: We use FOR and SINCE to say HOW LONG something has been happening. Ex. I have been waiting FOR two hours. I have been waiting SINCE 8 o´clock. Cuando gustes, Silvana