`1.` When were they here?

`-` "They" là ngôi số nhiều nên to be là "were"

`2.` When did your team give away clothes to the homeless people?

`3.` When did this mechanics work here?

`4.` When did this tutor teach the disabled children?

`-` teach - taught - taught: dạy

`5.` When did ghe get it?

`-` get - got - got/gotten

`6.` How long has Tony taken part in charity work?

`-` take - took - taken

`-` "Tony" là ngôi số ít nên trợ động từ là "has"

`7.` How long has he been in Europe?

`-` "he" là ngôi số ít nên trợ động từ là "has"

`8.` How long has your neighbor suffered from cold?

`9.` How long have you taken care of this orphan?

`-` "you" là ngôi số nhiều nên to be là "have"

`10.` How long has his grandmother gone to church?

`-` go - went - gone: đi

________________________________________________

When + did + S + V(nguyên thể) + O? `=` How long + have/has + S + V(pp) + O?

Cấu trúc chung :

`-` How long + have / has + V3 / PII ?

`-` When + did + S + V ?

`1`.When were they here ?

`2`.When did your team give away clothes to the homeless people ?

`3`.When did these mechanics work here ?

`4`.When did this tutor teach the disabled children ?

`5`.When did this girl get it ?

`6`.How long has Tony taken part in charity work ?

`7`.How long has he been in Europe ?

`8`.How long has your neighbor suffered from cold ?

`9`.How long have you taken care of this orphan ?

`10`.How long has his grandmother gone to this church ?

`\text{@ TheFox}`