大家
大家 means “everyone” in 大家早上好, addressing the whole group rather than one person. It commonly appears before a greeting or statement when speaking to several people. Use it when addressing a group, such as at the start of a class or meeting.
早上
早上 means “morning” in 大家早上好. It identifies the time of day for this greeting. 早上好 is used when greeting people in the morning, including a group addressed with 大家.
好
好 means “good” and functions as part of the greeting 大家早上好, meaning “Good morning, everyone.” In this expression, it completes the greeting after the time phrase 早上. Use the pattern 早上好 when greeting someone in the morning.
你
你 means “you” in 你好吗? and refers to the person being addressed. It appears before the question particle 吗 in this question. Use 你 when asking one person about their condition or addressing them directly.
吗
吗 turns 你好吗? into a question asking whether the statement is true, so the whole line asks “How are you?” It comes at the end of this yes-or-no question. A common reuse pattern is a statement followed by 吗 to ask a question.
我
我 means “I” or “me” in 我很好 and identifies the speaker. It comes before 很好 to say how the speaker is. Use 我 at the beginning of a sentence when talking about yourself.
很
很 links 我 to the description 好 in 我很好, expressing that the speaker is fine or well. Here it forms the natural expression 很好 rather than simply naming an object. 很好 can be reused to describe something positively or to say that someone is doing well.
高兴
高兴 means “glad” or “happy” in 很高兴认识你. Together with 很, it expresses that the speaker is glad to meet the other person. Use 很高兴认识你 when meeting someone for the first time or being introduced.
认识
认识 means “meet” or “get to know” in 很高兴认识你, referring to becoming acquainted with the person addressed. It follows 很高兴 and comes before 你 in this expression. Use the pattern 很高兴认识 + person when expressing pleasure at meeting someone.
祝
祝 means “wish” in 祝你今天愉快 and introduces a good wish for another person. It is followed here by the person 你 and the desired outcome 今天愉快. Use 祝 + person + wish when offering someone a good wish, such as at a farewell.
今天
今天 means “today” in 祝你今天愉快 and specifies the day connected with the wish. It appears before 愉快 to describe the kind of day being wished for. Use 今天 when referring to the current day in a sentence or wish.
愉快
愉快 means “pleasant” or “enjoyable” in 祝你今天愉快, describing the day the speaker wishes the other person to have. It completes the good wish after 祝你今天. Use it in a wish about someone’s experience being pleasant.
不客气
不客气 is the conventional reply meaning “You’re welcome” in 不客气. 不 means “not,” while 客气 refers to being polite or formal, so together the expression tells the other person not to be formal or ceremonious. Use 不客气 after someone thanks you.