Present "doubt" | I | doubt | |
Present Continuous "doubt" | I | am doubting | |
Simple past "doubt" | I | doubted | |
Past Continuous "doubt" | I | was doubting | |
Present perfect "doubt" | I | have doubted | |
Present perfect continuous "doubt" | I | have been doubting | |
Past perfect "doubt" | I | had doubted | |
Past perfect continuous "doubt" | I | had been doubting | |
Future "doubt" | I | will doubt | |
Future continuous "doubt" | I | will be doubting | |
Future perfect "doubt" | I | will have doubted | |
Future perfect continuous "doubt" | I | will have been doubting |