1.He said (that) he joined army in 1945.
2.Tom says (that) the beach is wonderful.
3.The teacher asked (that) who would not go swimming?(直接引语变间接引语要注意时态的变化)
4.The teacher asked whether/if everyone was here today.
5.Teacher asked me to open my mouth.(Ask 既有询问的意思,也有要求的意思,此处为第二种意思）