Usages of seharusnya
Dia seharusnya menghubungi ibunya tadi malam, namun dia lupa.
He/She should have contacted his/her mother last night, however he/she forgot.
Kecuali Anda sakit, seharusnya Anda ikut latihan singkat; kalau butuh bantuan, beri kabar.
Unless you are ill, you should join the short practice; if you need help, let me know.
Seharusnya kita membaca catatan dulu, namun kita langsung berdiskusi.
We should have read the notes first, however we discussed right away.
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