French language Q&A Forum

Why is  "Ils ont été" and not "Ils étaient" ? These answers for were baffle me. They have been - They were, or are they interchangeable ?

"by punching a wall" - how does this translate to the above and why? the phrase is "donner un coup de poing" so why is it "un" replaced with "des" here? and why is "dans le mur" when it says "punching A wall"?

Somewhere in my past studies, I was told that using "bien" with "aimer" actually lessens its meaning from love to like.  Did I get that wrong, because in my recent lessons, it's used more as an intensifier.  Sorry if I missed this on the thread before.

Currently, I am doing a part time job.

Is it right that you don't pronounce the 'S' at the end of 'suis' when it's followed by 'à'?

I had thought anytime a vowel sound follows a word ending in 's', you pronounce that s. Like with 'Je dine dans une...'

Which is right and why?

ce sont des trains.

ou 

ces sont des trains.

I have never seen "merci pour". From my knowledge, merci or remerci is followed by "de". Please provide further explanation on this topic or Is there a lesson on this within Kwizqi? 

Could this be a mistake in the transcript?    ...qui tienne dans une cabin d'avion 

Does this convention only work when talking about full thousands/millions/billions? What if you want to say 12,505 things or 1,350,000 things?