1/ My father started washing his car in the morning

-> My father has

2/ When did she begin to do research on lung cancer

-> How long

`1.` My father has washed his car in the morning

`-` Chuyển từ HTHT `->` QKĐ dạng khẳng định:

`+)` S `+` started `+` to `-` V/Ving `+` ...

`=` S `+` have/has `+` VpII `+` ...

`2.` How long did she begin to do research on lung cancer?/How long has she done research on lung cancer?

`-` Chuyển từ HTHT `->` QKĐ dạng nghi vấn:

`+)` When `+` did `+` S `+` begin `+` to `-` V?

`=` How long did `+` S `+` begin `+` to `-` V?

`=` How long have/has `+` S `+` VpII?

`FrozenQueen`

`1`.My father has washed his car in the morning

`->` Thì HTHT : S + have / has + VpII

`=>` He , She , It `+` has

`->` S + started / began + V-ing / to V : Bắt đầu làm gì

`=>` S + have / has + VpII + for time / since timeline : Đã làm bao lâu / từ khi nào

`2`.How long has she done research on lung cancer ?

`->` Thì HTHT ( NV ) : Have / Has + S + VpII ?

`=>` Has `+` He , She , It

`->` When + did + S + start / begin + V-ing / to V ? : Bắt đầu làm từ khi nào

`=>` How long + have / has + S + VpII ? : Đã làm được bao lâu

`\text{# TF}`