How to say "I have class now"


When said in English, this sentence means that you have class in the near
future, despite using now. Is it okay to omit から in the sentence below, or
does that change the meaning?

> 今 **から** 授業があるので、行かなければならない。またね。




You can omit `今から` and the meaning will be unchanged.

Just saying 今、授業がある could be okay but I think it conveys that the class is
already going on at the moment. 今から is usually like "from right now" or just
"now" like in your example.  
To say "from now on" implying a continuity, it would be "これから" or "今後".

By the way, you are mixing different level of speaking in your sentence. またね
is quite familiar compared to your `あるので` and `行かなければならない` which are a bit
heavy.




You can omit `今から` and the meaning will be unchanged.

Just saying 今、授業がある could be okay but I think it conveys that the class is
already going on at the moment. 今から is usually like "from right now" or just
"now" like in your example.  
To say "from now on" implying a continuity, it would be "これから" or "今後".

By the way, you are mixing different level of speaking in your sentence. またね
is quite familiar compared to your `あるので` and `行かなければならない` which are a bit
heavy.

