English Grammer -Easy to know_part-2

 Tense's shortcut

Auxiliary Verb	Principle Verb
Be verb     Am,Is,Are,Was,Were, Been,Being.	Ø  [Verb+ing]
Have verb      Have,Has,Had.	Ø Verb=>Past participle form.
Modal verb      Can,Could,May,Might,Shall,Should, Will,Would,Must,Need,Ought to,Have to,used to,Going to,Be supposed to,Be able to,Dare,Had better. Etc.	Ø   Ø Verb=>Base form.
Do verb     Do,Did,Does.	Ø  Verb=>Base form.