Sorry,I did not do my English homework,because I wasn't feeling very well.
Sorry,I did not write my English homework,because I was ill.
Sorry,I did not do my English homework,because I have forgotten.
Sorry,I have forgotten to do my English homework.
Sorry,I did not do my English homework,because there was a power cut(停电) last night.
没有做作业有很多藉口呢!很高兴能够帮到你,希望对你有助,祝你学业进步!(不须要再用藉口)