Please___the letter for me,for I forgot____ the letter this morning.应该填什么?

问题描述:

Please___the letter for me,for I forgot____ the letter this morning.应该填什么?

send.......sending

send;to send
请帮我寄信吧,我早上忘记寄这封信了

post ,to post

第一句是祈使句,动词原形开头
第二句是forget to do 忘记没做某事。

send
to send

forget to do 忘记去做某事
forget doing 忘记做过某事

Please【post】 the letter for me,for I forgot【to post】 the letter this morning.
请帮我寄信吧,我今天早上忘记寄出去了