1.Mary has written a postcard to her aunt already(改为否定句)

问题描述:

1.Mary has written a postcard to her aunt already(改为否定句)
Mary____written a postcard to her aunt____
请不要只回答ABCD,

楼主好,
Mary has not written a postcard to her aunt yet.
现在完成时否定,在助动词has/have后加not.
yet用于疑问和否定中
already用于肯定