单词：
madrugada (early morning) 凌晨 [0点至6点]
manh? (morning) 早晨，上午 [6点至12点]
meio-dia (noon) 中午 [12点]
tarde (afternoon) 下午 [12点至18点]
noite (evening，night) 晚间，夜间 [18点至24点]
meia-noite (midnight) 半夜 [24点]
anteontem (day before yesterday) 前天
ontem (yesterday) 昨天
hoje (today) 今天
amanh? (tomorrow) 明天
depois de amanh? (day after tomorrow) 后天
esta manh? (this morning) 今天早晨(或上午)
ontem de manh? (yesterday morning) 昨天早晨(或上午)
amanh? de manh? (tomorrow morning) 明天早晨(或上午)
hoje ao meio-dia (this noon) 今天中午
ontem ao meio-dia (yesterday noon) 昨天中午
amanh? ao meio-dia (tomorrow noon) 明天中午
hoje à noite (this evening) 今天晚上(或夜间)
ontem à noite (yesterday evening) 昨天晚上(或夜间)
amanh? à noite (tomorrow evening) 明天晚上(或夜间)
有时间限制的问候语：
Bom dia! (Good morning!) 你好！早安！上午好！[0点至12点]
Boa tarde! (Good afternoon!) 下午好！[12点至18点]
Boa noite! (Good evening! 或 Good night!) 晚上好！晚安！[18点至24点]
没有时间限制的问候语：
Olá! (Hello) 你好！
Oi! (Hi) 你好！
Como vai? (How are you?) 你好吗？
Tudo bem? (How are you?) 你好吗？