Questions & Answers about Tôi thấy dấu này.
Tôi means I and is a neutral, polite way to refer to yourself.
It is very common in textbooks because it is safe and widely understood. However, in real Vietnamese, people often choose pronouns based on age, relationship, and social context. For example, instead of tôi, a speaker might say mình, em, anh, chị, or other pronouns depending on who they are talking to.
So tôi is correct here, but it is not the only possible word for I.
Thấy means to see.
In this sentence, Tôi thấy dấu này means I see this mark/sign or I can see this mark/sign.
A useful point is that thấy often focuses on the result of perception: you actually notice or perceive something. It is often different from nhìn, which is more like to look at.
For example:
- Tôi nhìn cái bảng. = I look at the board.
- Tôi thấy cái bảng. = I see the board.
So in your sentence, thấy means the speaker is perceiving the mark.