我沒有想到這堂課會有這麼多外國學生，而且他們來自世界各地，因此在跟同學

我沒有想到這堂課會有這麼多外國學生，而且他們來自世界各地，因此在跟同學們進行討論時遇到了溝通困難(我的英文也不是很好)

結果 (英文) 1:

I did not think this class there are so many foreign students, and they come from all over the world, so the communication difficulties encountered during discussions with the students (My English is not very good)

結果 (英文) 2:

I didn't expect there would be so many foreign students in this class, and they came from all over the world, so I had difficulty communicating with my classmates (my English is not very good)

結果 (英文) 3:

I didn't expect that there would be so many foreign students in this class, and they come from all over the world, so they met with communication difficulties when discussing with their classmates (my English is not very good either)