Past perfect
Classified in English
Written at on 
English with a size of 1.16 KB.
Present simple-> I work. Present continuous->I'm working. Present
perfect->you have worked. Present perfect continuous->i have been working.
past simple->I worked. Past continuous->I was working. Past perfect->I
Had been working. Past perfect simple->I had worked. Future simple->I will
Worked. Future continuous->I will be working. Future perfect simple->I
Will have worked. MODALS AND SEMIMODALS->can, could, be able to, have to,
May, might, must, mustn't, should, ought to, shall, will. Modal perfect: modal +
Have