1.I do mean welcome home.
【口語講解】這里的"mean"意思是“認真的”,“do”起強調作用。
2.Something wrong?
【口語講解】這是“Is there something wrong?”的縮略語,常用在口語中。
3.The weather couldn't have been better.
【口語講解】can/could not be better意思是“沒有比這更好的了,非常棒”。如:I couldn't feel much better!我感覺太棒了!
4.Why don't you go to your room, Mom, and get some sleep.
【口語講解】這里的why don't表示建議、委婉的語氣,類似的還有"who not",后面都跟動詞原形。