Simple Present

Simple  Present (Waktu Sekarang)

1)   Simple Present Tense (waktu sekarang)
    She writes some letters now (active)
    Dia menulis beberapa surat sekarang
   (S + Verb1 + O/C)

    Some letters are written by her now (passive)
    Beberapa surat ditulis oleh dia sekarang
   (S + To Be(am,are,is) + Verb3 + O)

2)   Present Continuous Tense (sedang berlangsung)
    She is writing some letters now (active)
    Dia sedang menulis beberapa surat sekarang
   (S + To Be(am,are,is) + (Verb1+ing) + O/C)

    Some letters are being written by her now (passive)
    Beberapa surat sedang ditulis oleh dia sekarang
    (S + To Be(am,are,is) + being + Verb3 + O)

3)   Present Perfect Tense (telah dikerjakan)
    She has written some letters (active)
    Dia telah menulis beberapa surat
    (S + have,has + Verb3 + O/C)

    Some letters have been written by her (passive)
    Beberapa surat telah ditulis oleh dia
    (S + have,has + been + Verb3+ O)

Present Perfect Continuous Tense (telah sedang dikerjakan)
    She has been writing some letters for two hours (active)
    Dia telah sedang menulis beberapa surat selama 2 jam
    (S + have,has + been + (Verb1+ing) + O/C)

    Some letters have been being written by her for two hours (passive)
    Beberapa surat telah sedang ditulis oleh dia selama 2 jam
    (S + have,has + been + being + Verb3 + O)