Động từ theo sau bởi to-V: Lý Thuyết

Sau các động từ này bắt buộc dùng to + V nguyên thể:

• want (muốn), decide (quyết định), hope (hi vọng), plan (dự định)
• promise (hứa), agree (đồng ý), refuse (từ chối), offer (đề nghị)
• manage (xoay xở được), afford (đủ khả năng), expect (mong đợi)
• learn, pretend, fail, seem, appear, threaten

• She decided to study abroad. (❌ decided studying)
• He refused to answer the question.

Nhiều động từ cần tân ngữ chỉ người rồi mới tới to-V:

S + V + O + to V

• ask: The teacher asked us to be quiet.
• tell, advise, encourage, allow, remind, warn, invite, expect, want
• My parents encouraged me to take part in the contest.

Bẫy: quên tân ngữ — ❌ She advised to go early. → ✅ She advised me to go early.

Dùng to V (hoặc in order to / so as to) để trả lời câu hỏi "để làm gì":

• She went to the library to borrow some books.
• He works hard to support his family.

• Tính từ + to V: This exercise is easy to do. / I'm happy to meet you. / It's important to arrive on time.
• Danh từ + to V: I have a lot of work to do. / She has no time to rest.
• Sau the first/the last/the only và so sánh nhất: He was the first to arrive.

1. Nhớ nhóm động từ: want/decide/hope/promise/agree/refuse → to-V; enjoy/avoid/finish/mind/suggest → V-ing.

2. Không quên tân ngữ trong V + O + to V.

3. Sau to là NGUYÊN THỂ: ❌ decided to studying → ✅ to study.

4. Phủ định đặt not trước to: She decided not to go.