Giúp mk với Giải thích đáp án nha

TL:

You've been looking at that timetable for the last ten minutes. It can't be that confusing said Sheila angrily.
I do wish you'd be quiet! I've had a splitting headache thanks to you! replied Matt.
Mum! Dad! Please! said Alison. You're both being  very silly. There is no point at all in blaming each other. That's not going to help us find out what time the next train to Budapest is due to leave.
You are  quite right, Darling. I am sorry, said Sheila. Me too mumbled Matt. Now let's have another look at this timetable. Well it looks like we have definitely missed the last train today. That was the 18.20 we just missed, wasn't it ?
I think so said Sheila. I mean  it did leave at 18.20. Whether it's actually going to Budapest or not is another question.
Well one thing is not in doubt said Matt. What's that ? asked Sheila and Alison together. This is the worst holiday we've ever  been on said Matt. Next year we're going to Agreed said Sheila and Alison

=> Giải thích:

Have / Has + V III= Hiện tại hoàn thành

Have/Has+ been + V = Hiện tại hoàn thành liên tục
Am / Is / Are + V-ing = Hiện tại tiếp diễn
S + Vs/es + ... = Hiện tại đơn