改为否定句： Rick is helping his sister learn English. Rick _ _ his sister learn English.

分类: 作业答案 • 2022-06-09 00:30:01

问题描述：

改为否定句： Rick is helping his sister learn English. Rick _____ _____ his sister learn English.

答

isn't

答

is not helping

答

isn't,helping

答

Rick isn't helping his sister learn English.

改为否定句： Rick is helping his sister learn English. Rick _____ _____ his sister learn English.