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