3.4.1 WH-INTERROGATIVE CLAUSE WH-INTERROGATIVE CLAUSE FOLLOWS PREPOS...

2.3.4.1 Wh-interrogative clause

Wh-interrogative clause follows preposition and modifies the preposition

Ex: He gave the question of who was responsible for her death.

Anh ta đưa ra câu hỏi về việc ai chịu trách nhiệm về cái chết của cô ấy.

(https://traloihay.net)

Ex: "I keep thinking about what happened yesterday."

Tôi không ngừng nghĩ về chuyện xảy ra ngày hôm qua.

Or: He was not sure of what he had seen.

Anh ấy không chắc lắm về cái anh ấy đã nhìn thấy.

(https://traloihay.net)

After prepositional that is translated by ―về‖ in Vietnamese, writers translate the

wh-interrogative clause depending on context of sentence. Wh-interrogative

clause in Vietnamese equivalence in these examples doesn‘t contain the

interrogative meaning.