1. Past Future Tense
    She would write some letters when you came (active)
    Dia akan menulis beberapa surat ketika kamu datang
    [S + should,would + Verb1 + O/C]
    Some letters would be written by her when you came (passive)
    Beberapa surat akan ditulis oleh dia ketika kamu datang
    [S + should,would + be + Verb3 + O]
2. Past Future Continuous Tense
    She would be writing some letters on Monday last week (active)
    Dia akan sedang menulis beberapa surat pada hari Senin minggu lalu
    [S + should,would + be +(Verb1+ing) + O/C]
    Some letters would be being written by her on Monday last week (passive)
    Beberapa surat akan sedang ditulis oleh dia pada hari Senin minggu lalu
    [S + shoul,would + be + being + Verb3 + O]
3. Past Future Perfect Tense
    She would have written some letters if  you hadn’t come here (active)
    Dia akan telah menulis beberapa surat  jika kamu belum datang kesini
    [S + should,would + have + Verb3 + O/C]
    Some letters would have been written by her if  you hadn’t come here (passive)
    Beberapa surat akan telah sedang ditulis oleh dia jika kamu belum datang kesini
    [S + should,would + have + been + Verb3 + O]
4. Past Future Perfect Continuous Tense
    She would have been writing some letters by March this year (active)
    Dia akan telah sedang menulis beberapa surat menjelang Maret tahun ini
    [S + should,would + have + been + (Verb1+ing) + O/C]
    Some letters would have been being written by her by March this year (passive)
    Beberapa surat akan telah sedang ditulis oleh dia menjelang Maret tahun ini
    [S + should,would + have + been + being + Verb3 + O]