Key points: which can guide attributive clauses and which can't.
Let's formally analyze the similarities and differences and usage differences between these two words ~ ~
1, the difference in meaning
(1) What do you mean?
Pronunciation is: British pronunciation [w? t？ ]? American pronunciation [w? t？ ]
Mainly used as pronouns, determiners and adjectives. When used as a pronoun, it means "which one, which ones; (of things) those of …, those of …; (provide further information about sth) that, that, thes "when used as a determiner means" which one, which ones; (of things) those of …, those of …; (Provide further information about sth) When used as an adjective, "that, that, that" means "which one, which ones; No matter which one; (provide further information about sth) those ".
② What do you mean?
Pronunciation is: British pronunciation [w? t]？ American pronunciation? 【hw？ t； HWát]
Mainly used as pronouns, adjectives, adverbs and interjections. When used as a pronoun, it means "what; How; When used as an adjective, it means "what; How; "How", when used as an adverb, means "to what extent and in what way", and when used as an exclamation, means "what; How about it? "
2. Usage differences: which can guide attributive clauses and which can't.
(1) Soldiers opened fire on a car? It didn't stop at the army checkpoint.
The soldiers opened fire on a car that was not parked at a military checkpoint. (Note: refers to cars)
(2) this book? He wrote this on 1935, and it still sells well.
The book he wrote on 1935 still sells well. (Note: refers to this book)
He also bought a new Toyota Camry. He offered a loan for 60 months.
He also bought a new Toyota Camry and paid for it with a 60-month loan.
Note: this refers to a new Toyota Camry
(4) What account does Lolas use? The website has more than160,000 fans, and publishes fitness tips, cooking methods and daily life updates.
Lolas uses this account with more than10.6 million fans to post fitness advice, ideas for preparing meals and daily life updates.
Note: It refers to that account.
He is a good teacher. This is what we all know. ? As we know, he is a good teacher.
Note: This means that he is a good teacher.
(6) They set a new record in 1996. This is a celebration of them as a real band. They released a new album on 1996, which is a celebration of their real band era.
Note: This means that they created a new record in 1996.
As can be seen from the above examples, whether it is a finite clause or an unqualified clause, it refers to something that has appeared or been mentioned before, which either narrows the scope of this thing (limited) or supplements the scope of this thing (infinite), which means what is certain. On the other hand, What doesn't refer to anything that has appeared or been mentioned before, so it can't guide attributive clauses.
The above is the related knowledge of English words which and what shared for you, hoping to further help you distinguish these two words. Just like it ~ ~