1. i will have them conference you in from home
문법적설명이 필요합니다. 조합이 안돼요

2. just like potato chips, you just can't have one, for etiquette requires that at least three be served to you.

be가 저기에 왜있는지

before we leave, our advice is put away your electronic devices

is가 왜 저기에 있는지 모르겠어요.

3. i still consider this my hometowm 이곳을 고향이라고 생각한다.

this 와 my사이에 to be 같은게 있어야할거같은데 consider 을 쓰는 문법있나요?