Confusing English: within vs by (Differenza tra WITHIN e BY - Inglese per seam Cambridge)

Hello everyone, this is Marc again. Today we're going to look at the difference between within, in, and by. Three prepositions that might sound the same to you, but they're not. Within and in, we use it for a period of time. Period of time, as you can see in the yellow box, and the arrow. Okay, period of time. I wrote down an example. This project has to be finished, for example, within one week. This project has to be finished within one week. The example for the in preposition, always in the yellow box at the top right, this project has to be finished in one week. It's the same as this project has to be finished within one week. Or we can use also in the following example. We are going on holiday in four days, so that means that within four days we're going on holiday. Okay, that's for within and in. Then, by is for a precise time or moment. I put a cross on the red box, so to indicate that it's a precise time or moment. And the example is, I must finish my project by 5 p.m. And the other example that students have problems with is, I have to complete the report by tomorrow by tomorrow. I have to complete the report. Instead, some people say, I have to complete the report within tomorrow. That's wrong. We say, I have to complete the report within four days because it's a period of time. Okay, period of time, within and in, and by precise time or moment. Okay, I hope this will help you, and I see you next time. Have a nice day. Please share.