Robert failed three times () he finally reached the North PoleA until B before是因为如果用until的话,前面要加not 原因,才选before的吗

来源:学生作业帮助网 编辑:作业帮 时间:2024/06/01 03:13:22

Robert failed three times () he finally reached the North Pole
A until B before
是因为如果用until的话,前面要加not 原因,才选before的吗

是的.如果用until前面改否定