$6.$ He suggested singing a few songs.

- S + suggest + V-ing: đề xuất làm việc gì.

$7.$ John asked me if I was going to visit my aunt the next day.

- Câu hỏi tường thuật (Yes/ No question): S + asked + O + if/ wether + S + V (Lùi thì).

- Lùi một thì: Hiện tại tiếp diễn $→$ Quá khứ tiếp diễn.

- Thay đổi từ: you $→$ I $;$ your $→$ my $;$ tomorrow $→$ the next day.

$8.$ The girl said that that room was dirty because they hadn't cleaned it for ages.

- Câu tường thuật trần thuật: S + said + (to O) + (that) + S + V (Lùi thì).

- Lùi một thì: Hiện tại đơn $→$ Quá khứ đơn $;$ Hiện tại hoàn thành $→$ Quá khứ hoàn thành.

- Thay đổi từ: we $→$ they $;$ this $→$ that.

$9.$ Fred asked me if I wanted to play for my school team.

- Câu hỏi tường thuật (Yes/ No question): S + asked + O + if/ wether + S + V (Lùi thì).

- Lùi một thì: Hiện tại đơn $→$ Quá khứ đơn.

- Thay đổi từ: you $→$ I $;$ your $→$ my.

$10.$ She wanted to know which country had been the first to send man into the space.

- Câu hỏi tường thuật (Wh- question): S + asked + O + wh- word + S + V (Lùi thì).

- Lùi một thì: Quá khứ đơn $→$ Quá khứ hoàn thành.

`6`.He suggested singing a few songs

`\rightarrow` S + suggest + V-ing : Đề nghị / Gợi ý

`7`.John asked if I was going to visit my aunt the following day

`\rightarrow` Câu tường thuật NV : S + asked + O + if / whether + S + V ( lùi thì ) ( `7 , 9 , 10` )

`\rightarrow` HTTD `->` QKTD : S + was / were + V-ing

`8`.The girl said that that room was dirty because they hadn't cleaned it for ages

`\rightarrow` Câu tường thuật : S + said + that + S + V ( lùi thì )

`\rightarrow` HTĐ `->` QKĐ : S + Ved / V2 `-` S + was / were + adj / n ( `8 , 9` )

`\rightarrow` QKĐ `->` QKHT : S + had + V3 / PII ( `8 , 10` )

`9`.Fred asked whether I played for my school team

`10`.She wanted to know which country had been the first to send man into the space

`\text{# Kirigiri}`