当宾语从句的主语和主句的主语相同,且主句的谓语动词是hope、wish、decide、agree、choose等时,从句可简化为不定式结构。
例如:I hope that I can meet you soon.=I hope to meet you soon.
当宾语从句的主语和主句的主语相同,且主句的谓语动词是know、remember、forget、learn等时,从句可简化为”疑问词+不定式“结构.
例如:I don't know which one I will choose.=I don't know which to choose.
当主句的谓语动词是ask、tell、show、teach等,宾语从句的主语又和间接宾语一致时,从句可简化为“疑问词+不定式”结构.
例如:Please tell me what I should do first.=Please tell me what to do first.
seem后的宾语从句可用不定式简化,通常将宾语从句的主语作为简化后句子的主语;
It seems that American fast food is the most popular in the world=American fast food seems to be the most popular in the world.
I believe what the boy said.=I believe the boy's words.