had是什么時態怎么用

　　例句

　　1、The submarine had had time to submerge before the warship could approach.

　　潛水艇沒等軍艦靠近就及時潛入水下了。

　　2、She had had a rootless childhood moving from town to town.

　　她小時候居無定所，在各地流浪。

　　3、It transpired that the gang had had a contact inside the bank.

　　據報這伙歹徒在銀行里有內應。

　　4、She had had the foresight to prepare herself financially in case of an accident.

　　她有先見之明，經濟上作了準備以防萬一發生事故。

　　5、They had had their pet dog stuffed.

　　他們請人把他們的寵物狗制成了標本。