Nonfinite Verbs
(非谓语动词)
谓语：说明主语所做动作或含有特征和状态。它有些人称、数、时态和语态改变。 e.g. He works.     He takes care of the baby.     He will go to Shanghai.     He didn’t go to Shanghai.     He has gone to Shanghai.     You are students.     You look smart.
单谓语或动词短语
情态动词/助动词+ v.
系动词+表语
非谓语：主要包含不定式（to do），ving形式以及过去分词（done）。无人称，数改变，不单独作谓语，但保留动词特点，能够有宾语或状语。e.g. He works.     He wants to work here.     He is working now.     He has done his work.     You are students, so you don’t work in  the factory.     Being student ...