Should - Advice, recommendation. " I think i't a good idea", Shouldn't - advice or recommendation not to do something. "I think it's is not a good idea", Must - obligation, specific or very strong advice , Mustn't - prohibition, there is no possible way to do this, Have to - general obligation, others have decided this for me, don't have to - it's not an obligation, it's optional,

Modal verbs

สั่งพิมพ์
ฝัง

ลีดเดอร์บอร์ด

สไตล์ภาพ

ตัวเลือก

สลับแม่แบบ

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