1. 當主句謂語動詞是find，see，watch，hear等感官動詞時，從句常簡化為賓語+賓補結構，賓補為不帶to的'不定式或V-ing形式。如：
She found that the wallet lay/was lying on the ground. She found the wallet lie/lying on the ground.
2. 當主句謂語動詞是hope，wish，decide，forget，plan，agree等，且主句主語與從句主語相同時，從句可簡化為不定式結構。如：
She agreed that she could help me with my maths. She agreed to help me with my maths.
3. 在連線代詞/副詞引導的賓語從句中，當從句主語與主句主語或間接賓語一致時，賓語從句可簡化為連線代詞/副詞+不定式結構。如：
Can you tell me how I can get to the station?Can you tell me how to get to the station?
