imagine 的用法特殊之处是：imagine doing 和 否定时要否定转移.至于宾语从句,没有特殊要求.跟普通动词一样.
宾语从句的时态
宾语从句的时态原则上应受主句的时态的影响.
1. 当主句是一般或现在类时态时 (如：一般现在时、一般将来时、现在进行时、现在完成时),宾语从句可根据实际情况使用任何时态.如 He says that he often gives up. / He says that he has given up. / He says that he will give up. // He has told me that he always starts to work at 6:00. / He has told me that he started to work yesterday. / He has told me that he will start to work next week.
2. 当主句是过去类时态时(如：一般过去时、过去将来时、过去进行时、过去完成时),宾语从句须用过去类时态.如 They said that they caught a cold. / They said that they had caught a cold. / They said that they would caught a cold.
3. 当宾语从句表示的是一个客观事实或真理时,无论主句是什么时态,从句一律用一般现在时.如 The teacher says ( will say / has said / said / had said ) that the earth moves around the sun.