关于动词"observe"的主动和被动语态造句，结合权威信息整理如下：

一、主动语态用法

观察动作

- The police observed him entering the bank with a shotgun.

- She observed the children carefully as they played in the park.

*（感官动词+动词原形）*

注意细节

- He observed that the sky was turning red.

- We observed the changes in the plant over the months.

*（感官动词+动词不定式）*

遵守规则

- The company observes strict safety protocols.

- She observes her parents' instructions carefully.

*（动词+宾语+宾语补足语）*

二、被动语态用法

被观察动作

- The man was observed to enter the bank with a weapon.

- The experiment was observed by the researchers.

*（感官动词+to+动词原形）*

被注意细节

- It was observed that the experiment failed.

- The changes were observed by the scientists.

*（感官动词+to+动词原形）*

被遵守规则

- The law is observed by all citizens.

- The instructions were observed by the workers.

*（动词+宾语+宾语补足语）*

三、注意事项

感官动词（如see, hear, feel）在主动语态后接动词原形，在被动语态需加"to"。

非感官动词（如observe）主动被动同形，但需注意搭配介词（如observe sb do sth）。

被动语态中，不定式和现在分词需根据语境选择是否加"to"。