HAVE TO - NECESSITY/OBLIGATION, DON'T HAVE TO - NOT NECESSARY, MUST - STRONG ADVICE/OBLIGATION, MUSTN'T - PROHIBITION, CAN - ABILITY, SHOULD - ADVICE,

Modals: definition. HAVE TO-MUST-CAN-SHOULD

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?