What does "Boop" means?

When I speak English, I wanted to use something like "ever since" to express the period after certain time in the past. Is there any other way I can say "ever since"? If I use "from that time," does it also mean the same thing?

Good question! There are several other phrases you can use to express the same meaning as "ever since", or the continued action of something in the present from a certain point in the past. You can say "from that time", although it is a little more common to say "from that time on". You can also say "from then on" and "since that point". The main difference between these phrases and the phrase "ever since" is that "ever since" can be used at the beginning of a sentence while the others are not generally used to begin a sentence. Ex: Ever since I first drank coffee a year ago, I've had it every day. Ex: I first tried papayas last month and from that time on, I've eaten them every day. Ex: She swam in the ocean last week and from then on, she's swam every morning.

Is it common to put complete phrase after relative pronoun (who) common ?

No, it is not common to have a complete phrase or sentence after the relative pronoun "who". In the case of the video here, this sentence sounds a little unnatural with the pronoun "I" after "who". It would sound better in this case to say "who is very interested in business and entrepreneurship". This is almost a complete sentence in itself here, but changing "I" to "is" makes it not totally complete. Most of the phrases after the relative pronoun "who" are not fully complete. Ex: My doctor, who I trust very much, is going to see you today. Ex: For someone like him who is very interested in art, he would love this museum.

Can you tell me other famous landmarks in the United States?

Sure! I will put them in list form so that it doesn't get confusing. I will list ten popular ones. 1. Empire State Building 2. Mount Rushmore 3. Space Needle 4. Lincoln Memorial 5. Crazy Horse 6. Golden Gate Bridge 7. Cloud Gate 8. Hoover Dam 9. Gateway Arch 10. The National Mall

I think "dotted" here is used as a verb. What's the meaning?

That's right! It is used as a verb here. Here "dotted" means to be scattered over an area or location. As if they were marks on a map. Ex: There are cafes dotted all over Seoul. Ex: Very soon after the town was built, houses dotted the coast nearby.

What are synonyms for "move it"?

'move it!' is an expression used to tell someone to "hurry up", or "get out the way". A couple of synonyms for 'move it!' used as hurry up are 'make it quick/fast', 'get a move on', and a few synonyms for 'move it!' used as get out of the way are 'step/move aside', 'get lost', 'back off'.