Present "ascertain" | I | ascertain | |
Present Continuous "ascertain" | I | am ascertaining | |
Simple past "ascertain" | I | ascertained | |
Past Continuous "ascertain" | I | was ascertaining | |
Present perfect "ascertain" | I | have ascertained | |
Present perfect continuous "ascertain" | I | have been ascertaining | |
Past perfect "ascertain" | I | had ascertained | |
Past perfect continuous "ascertain" | I | had been ascertaining | |
Future "ascertain" | I | will ascertain | |
Future continuous "ascertain" | I | will be ascertaining | |
Future perfect "ascertain" | I | will have ascertained | |
Future perfect continuous "ascertain" | I | will have been ascertaining |