英语八年级下改错题

1.I need your help—Sure,that's no problem .

2.Here's what they say.

想问楼上的各位前辈们，
为什么第1题要把not改为no呢？？

1. that's not problem 改成 that's no problem 或 no problem
2. what they did say 改成 what they said

1.

not 改 no

2.

did 去掉

1、not 改为no
2、去did

not 改为 no
去did