Please correct a to the .
请把a改成the。
You should correct the small letter i to capital letter I .
你应该把小写的i改为大写的I。
She has corrected the mistakes in the report.
她修改了报告里的错误。
The correction of the report took her three hours.
她用了三个小时来修正报告中的错误。
I am not sure the correctness of this point.
我不确定这个观点的正确性。