Question

Kapan saatnya kita memakai was dan were?
dan kapan kita am, is, are?

Answer 1

Was/were = past continuous (contohnya kalo kita lagi cerita ke orang, kita cerita kalo kita sedang jalan jalan tuh di mall, I was window shopping at the mall) >> udh lewat

am/is/are = present continuous (lagi beneran terjadi, kayak ditanya what are you doing? kamu jawab I'm gardening now) >> terjadi sekarang dan belum selesai

Answer 2

Was dan were digunakan utk kalimat nominal (tnp verb) pada bentuk past tense.

was > utk subject tunggal (i, she, he, it)
were > utk subject jamak (you, they, we)

am, is, are digunakan utk kalimat nominal (tnp verb) pada bentuk present tense.

am > untuk subject I
is > utk subject tunggal (she, he, it)
are > untuk subject jamak (you, they, we)