なさいCommand to do

The imperative or command form (命令形) gives strong, direct commands, e.g. 食べろ ('Eat!'). On its own, it sounds harsh, so it's often softened. なさい is a more polite alternative, often used by parents or teachers toward children, e.g. 野菜を食べなさい ('Eat your vegetables!'). Both forms command action but differ in tone.

The dictionary/non-past form of a verb + な expresses a blunt command not to do something. In contrast, a verb stem + なさい expresses a strong but respectful command. For example, 食べるな means 'Don't eat it!' while 食べなさい means 'Eat it!' Despite being derived from an honorific verb, なさい is still a command and is used with lower-status people or children, not superiors.

ないでください is a polite way to ask someone not to do something. It is relatively neutral, and could be used with strangers or people equal in status to you. In contrast, なさい is a command form, similar to the English 'Do (this),' typically used when one person is in a higher position, such as teachers to students, adults to children, etc.

なさい is a firm but polite command form, often used by those in authority (like teachers or parents) toward subordinates. In contrast, ないで is a casual way to ask someone not to do something, e.g. 行かないで ('Don't go.'). It is typically used among close friends or family.

てください and なさい are both used to tell or ask someone to do something in Japanese. てください is a polite request, similar to 'Please (do this),' and is appropriate in neutral or formal situations, such as with strangers or people of equal status. なさい, on the other hand, is a firm command, closer to 'Do (this),' and is typically used by someone in a higher position, like teachers to students or adults to children.

Both are command forms, but with different tones. なさい is a polite but direct command, often used by teachers or parents, e.g. 食べなさい ('Eat.'). てごらん is softer and gently encourages someone to give something a try, e.g. 食べてごらん ('Try eating it'). Both are typically used from adults to children, or superiors to subordinates.

Both forms ask someone to do something, but the tone is different. なさい is a polite but direct command, often used by parents or teachers, as in これを使いなさい ('Use this.'). お～ください is a respectful request form, used to politely encourage someone like a customer or superior to do something, as in これをお使いください ('Please use this.').

Both forms are used to ask someone to do something, but with different levels of formality. なさい is a polite command often used from superiors to subordinates, as in 待ちなさい ('Wait.'). お～願う is extremely humble and formal, used in business or public announcements, as in お待ち願います ('We request that you to wait.').

なさる and なさい are derived from the same verb but used differently. なさる is an honorific form of する, used for respectful reference to someone's actions, as in 明日仕事なさいますか？ ('Will you be working tomorrow?'). なさい is the imperative form, used to firmly but politely instruct someone, as in 宿題をしなさい ('Do your homework.').