1. 语法讲解：
直接引语变间接引语
直接引语变间接引语最需要注意的是时态变化和相关词汇的变化。
直接引语 间接引语
一般现在时 一般过去时
一般过去时 过去完成时
一般将来时 过去将来时
现在进行时 过去进行时
现在完成时 过去完成时
can could
may might
must had to
this that
these those
now then
today that day
tonight that night
this week (month,etc.) that week (month，etc.)
yesterday the day before
last week (month,etc.) the week (month，etc.) before
three days(a year,etc.) three days (a year，etc.) before
tomorrow the next / following day
next week (month,etc.) the next / following week (month，etc.)
here there
come go
bring take
2. Then Dr. Millington asked the caller if he was a relative of the patient.
之后，米灵顿医生问打电话的人是否是病人的亲属。
知识点：relative常作形容词用，意为“相对的”，这里作名词，意为“亲戚”。
