Hey Pelin 👋🏻 The correct phrase depends on the context. "I'll be there by morning" means that you will arrive at a certain location before morning. "I'll be there until morning" means that you will stay at a certain location until morning. So, the appropriate phrase depends on whether you are talking about your arrival time or your departure time. Do you need to work on your English skills? Then book a trial lesson with me to see how we can practice together 🌹

Here’s the difference between the two sentences: "I'll be there by morning." This means you will arrive sometime before or around morning. It emphasizes arrival at or before a specific time. "I'll be there until morning." This means you’ll already be there and will stay until morning. It implies you’re at the location now (or will be) and won’t leave until the morning. So, if you're telling someone when you'll arrive, "I'll be there by morning" is correct. If you're telling someone how long you'll stay, "I'll be there until morning" is correct.

"I'll be there by morning" means you will arrive in the morning. Your listener should be ready to see you in the morning. It doesn't really say exactly what you are doing now. Here's a sentence that isn't on your list: "I'll be traveling until morning." This means you are traveling right now, and you will continue to be traveling all night. You will stop traveling in the morning. It doesn't actually say where you will be in the morning. A reasonable guess is that you will stop traveling because you have arrived at your destination. "I'll be there until morning" means you are not traveling. You are in a fixed place. Perhaps you are staying overnight in a hotel. Let me adjust the time of arrival, and put them all together. This would be a reasonable series of events: "I'm in a hotel now. I'll be there until morning. Then I will be driving for several hours, to your place. I expect to be there by noon."