Đáp án `+` Giải thích các bước giải:

`->` He asked her if she had enjoyed herself at the party the night before.

`-` Câu tường thuật (Yes/No questions)

`+` S + asked (sb)/wanted to know/wondered + if/whether + S + V(lùi thì)

`-` Lùi thì: QKĐ `->` QKHT

`-` you `->` she | yourself `->` herself

`-` last night `->` the night before.

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$\color{yellow}{\lll \text{NhatHuy}
\color{orange}{\text{ThichChoiLiqi} \ggg}}$