〜てください

1. Origins, structure, and basic meaning

• Structure: Add ください after a verb's て form.
• Basic usage: It requests an action from the listener, as in 窓を開けてください。.

2. Common pitfalls and similar expressions

• Connective forms by verb
  • Retain the changes in the て form, as in 書く → 書いてください, 待つ → 待ってください, and 読む → 読んでください.
• Request and permission
  • ここに書いてください asks the listener to write; ここに書いてもいいですか asks permission for the speaker to write. Distinguish who is expected to act.
• Strength of the wording
  • Although polite, it also serves as guidance or an instruction. When asking a major favor, the form alone does not guarantee a sufficiently gentle request.