The most important parts to remember are as follows:
- If an active tense is in Simple Present Form it become simple Past
- Present continuous become Past Continuous i.e., to be in the continuous but verb in the past or Passive forms are made up of an appropriate form of the verb ‘to be’ followed by the past participle (pp) form of the verb eg.,
How to pronounce this word? will become How is this word pronounced?
We are redecorating the house will become The House is being redecorated
3. Therefore follow the following chart:
Tense/Verb Form -------------Active Voice ---------Passive voice
Simple Present ----------------Keeps --------------------is Kept
Present Continuous -----------is keeping --------------is being kept
Present Perfect ---------------has Kept ---------------has been kept
Simple Past ------------------Kept --------------------was kept
Past Continuous -------------was Keeping ------------was being kept
Past Perfect ----------------had Kept -----------------had been Kept
Future --------------------will Keep ------------------would be kept