Could we use 会 or is 可以 obligatory?
no. 会 refers to learned skilled, e.g. can cook, can speak Chinese, can sing, etc.
可以 is where some form of permission is being asked, or was granted.
I think 会 would change the meaning to “Will we ...”
Is it possible to say "我们可以去学校坐公共汽车“?
Nope, that would imply that you're going to school to catch the bus. Also, without the "吗" at the end you're making a statement rather than asking a question
No, that means "Can we go to school to take a bus?", it is quite different.
I just suggested this: ”我们可不可以坐公共汽车去学校。“.
That's what I put. Any body know if/why it's wrong?
I think it’s right. Keep reporting it and eventually you will get an automated email saying it’s been accepted.
能 is also correct.
It should be 汽車 not 汔車.
can someone break this sentence down please?
我们 = we
可以 = possibly/can
坐 = by means of (lit: "sitting")
公共汽车 = bus
去 = go
学校 = school
吗 = (question marker for yes/no-answer questions)
Well, literally, it's "We can take bus go school yes/no?"
My answer and correct answer matches
Can you put 'ke i' latter in the sentence, like before 'chu'? Or does it HAVE to go after 'wo men'?
The sentence you stated would not be grammatically correct. The only option would be 我们坐公共汽车去学校,可以吗?
公 (gōng) = public/collectively owned
共 (gòng) = common/general/to share
汽 (qì) = steam/vapor
车 (chē) = car/vehicle
公共汽车 (gōnggòng qìchē) = public common steam vehicle = bus