两道关于间接引语的问题第一道是这样的：1. I heard he___A.is going abroad B.will

两道关于间接引语的问题
第一道是这样的：
1. I heard he___
A.is going abroad B.will go abroad
C.was going abroad D.has gone abroad
正确答案选C,为什么不选D?
第二道是这样
2.He said,"Don't do that again."He___me___that again
A.said to me;not to do B.said to me;don't do
C.told me;don't do D.told me;not to do
正确答案是D,但是 请问 为什么改间接引语后DON'T DO改成了 NOT TO DO