1) I want to know [ who is a singer ]
2) I want to know [ who a singer is ]
Q. Is there any difference between two sentences in terms of meaning and grammar?
"I want to know who is a singer" means that you want to identify which person in a group is a singer (or which people are singers). "I want to know who a singer is" seems unusual. "I want to know who this singer is", for example, would be normal.
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"I want to know who is a singer" means that you want to identify which person in a group is a singer (or which people are singers).
"I want to know who a singer is" seems unusual. "I want to know who this singer is", for example, would be normal. You want to know the identity of the indicated singer, e.g. a singer that you are listening to, or one whose photo you are looking at.
Hoony1) I want to know [ who is a singer ]
2) I want to know [ who a singer is ]
Q. Is there any difference between two sentences in terms of meaning and grammar?
The explanation you are looking for regarding direct and indirect questions is this: In indirect questions, the auxiliary verbs do/does/did etc.are not used. In the