I am sorry for not （）（let）you know the good news earlier 动词填

I'm sorry for not ___(let)you know the good news earily I am sorry that I （）（forget）to post the letter for you 动词填空. -I am sorry i forget （ ） the letter for you I am sorry that I did not wtite to you earlier because I hav Sorry,I forgot____(tell)you the good news. i must apologize for not having let yu know earlier这里为什么用了完成 I supposed Tom （）（know）the news before you told him 动词填空.是ha I supposed Tom （）（know）the news before you told him 动词填空.. 英语翻译Dear friend,sorry for not replying you earlier before i I have some good＿＿（news）for you. I must apologize for not letting you know earlier. 句子成分分析,另外 i must apologize for not letting you know earlier为什么这里是 lett