During – We use during + noun to talk about when something happens. With during, we answer the question when. It means “durante
👉 Some people got lost during the journey
👉 I will finish the novel during the summer break
🚫 I was studying during 2 hours
✅ I was studying for 2 hours
For – We use for + length of time to say how long something happens. With for, we answer the question how long
👉 We have known each other for a long time
👉 He worked in this company for over twenty years
While – We use while + subject + verb to talk about two things that are happening at the same time. It means “mientras”
👉 I had breakfast while you were in the shower
👉 You shouldn’t use your phone while you are driving
Meanwhile – It means “mientras tanto” and it is a linking adverb which connects and contrasts ideas between two sentences. It indicates that one event is going on at the same time as another
👉 Carl’s starting college in September. Meanwhile, he’s travelling around Europe
👉 I quit university 3 months ago. I have meanwhile been offered 3 job