`1.`Mrs.Lien advised Lan to spend more time doing her homework.

`->`S advise sb to do sth = S should + V : ai đó nên làm gì

`2.`Minh asked Ba if he could help him with his English speaking

`->`S + asked/ wanted to know/ wondered + if/whether + S + V + …

`3`.Lan told me that I should use that dictionary to find how to pronounce English words.

`->`S + says/said/told… + mệnh đề tường thuật ( lùi thì )

`#Cam`

`21`.Mrs.Lien advised Lan to spend more time doing her homework

`\rightarrow` Câu mệnh lệnh : S + asked / told / ... + O + ( not ) to do sth ( `21 , 23` )

`22`.Minh asked Ba if he could help him with his English speaking

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

`\rightarrow` Could `->` Could

`23`.Lan advised me to use this dictionary to find out how to pronounce English words

`\text{@ TheFox}`