1． “V” 是及物动词，后面需跟一个宾语，可充当宾语的有名词、代词、数词、不定式、V-ing 结构及名词性从句等，如：
　　　　I understand the program.
　　　　She asked to see the manager.
　　　　Mary is considering changing her job.
　　　　He said that he would call me tomorrow.

　　2． 这种结构有时必须跟状语，意义才完整（即 S + V + O + A），如：
　　　　We accepted their advice in buying a new car.
　　　　She completed the assignment just as the bell was ringing.
　　　　We don’t trust him because he often lies.
　　　　You make a promise only when you know you can keep it.