English Verb - To Maintain Infinitive - to maintain Present participle - maintaining Past participle - maintained 1. Present Tense Singular I maintain You maintain He/she/it maintains Plural We maintain You maintain They maintain 2. Present Progressive Tense Singular I am maintaining You are maintaining He/she/it is maintaining Plural We are maintaining You are maintaining They are maintaining 3. Past Tense Singular I maintained You maintained He/she/it maintained Plural We maintained You maintained They maintained 4. Present Perfect Tense Singular I have maintained You have maintained He/she/it has maintained Plural We have maintained You have maintained They have maintained 5. Present Perfect Progressive Tense Singular I have been maintaining You have been maintaining He/she/it has been maintaining Plural We have been maintaining You have been maintaining They have been maintaining 6. Past Progressive Tense Singular I was maintaining You were maintaining He/she/it was maintaining Plural We were maintaining You were maintaining They were maintaining 7. Past Perfect Tense Singular I had maintained You had maintained He/she/it had maintained Plural We had maintained You had maintained They had maintained 8. Past Perfect Progressive Tense Singular I had been maintaining You had been maintaining He/she/it had been maintaining Plural We had been maintaining You had been maintaining They had been maintaining 9. Future Tense Singular I will maintain You will maintain He/she/it will maintain Plural We will maintain You will maintain They will maintain 10. Future Progressive Tense Singular I will be maintaining You will be maintaining He/she/it will be maintaining Plural We will be maintaining You will be maintaining They will be maintaining 11. Future Perfect Tense Singular I will have maintained You will have maintained He/she/it will have maintained Plural We will have maintained You will have maintained They will have maintained 12. Future Perfect Progressive Tense Singular I will have been maintaining You will have been maintaining He/she/it will have been maintaining Plural We will have been maintaining You will have been maintaining They will have been maintaining