there's gotta be & there must be. What's the difference? Sentences: (1)There's gotta be something wrong with him. (2)There must be something wrong with him. Question: What's the difference between (1) and (2) ? Thanks!

Please help me with the following sentences. Hi there, I'm confused on the third sentence and I'd appreciate if anybody could help me. Sentence : If you have an existing brand name that you're known for, you'll probably not want to ditch that name just because you couldn't get the domain name. After all, it took you a lot of time and money to establish that name. If so, you might simply want to try to buy over the domain name from the current owner. My questions: in the third sentence, 1.Can I use 'could" instead of 'might'? Are there any differences? 2.Does 'simply' mean 'very,extremely "? 3.Can I use 'buy" instead of 'buy overt'? Are there any differences? Thanks in advance.

What are the differences between the following two sentences What are the differences between the following two sentences: 1. I'd like to introduce you to him. 2. I'd like to introduce him to you. Thanks in advance for answering my question.3. I'd like to introduce you to skiing. 4. I'd like to introduce the skiing to you.