`1`. was happened `->` happened

`-` when+ SVO ( khoảng TG không xác định trong QK): dấu hiệu thì QKĐ

`2`. born`->` was born

`-` Câu bị động ( thì QKĐ): S+ was/ were+ Vpp+ [ by O]+...

`3`. were come `->` came

`-` Thì QKĐ diễn tả hành động đã xảy ra và kết thúc trong QK ( không có TG xác định)

`4`. was arrived `->` arrived

`-` As+ QKĐ, QKĐ

`5`. place `->` placed

`-` Câu bị động (modal verb): S+ modal verb+ to+ be+ Vpp+ [ by O]+...

`6`. brought `->` were brought

`-` Câu bị động ( thì QKĐ)

`7`. given `->` being given

`-` pre+ Ving

`-` Câu bị động ( thì QKĐ)

`=>` was chuyển thành "being"

The Christmas I remember best from my childhood (1) was happened when I was about five, just after my younger sister (1)born. Lots of people (3)were come to our house with presents for us. I gave the job of taking the gifts and saying 'Thank you'. As each guest (4)was arrived, I handed boxes or bags which filled with things that wrapped in Christmas paper. I told which ones were for me and which ones had to be (5)place in a pile for my new sister. So many presents (6)brought for us. I will never forget the experience of (7)given so much. It really was a very special Christmas.

(1) was happened => happened 

Câu chủ động : S + V + O

(2) born => was born: đc sinh ra

câu bị động 

(3)were come =>came

hành động xảy ra trong QK và đã kết thúc ở HT

come-came-come

(4) was arrived=> arrived (câu chủ động)

(5) place => placed (câu bị động)

had to + be + P.P

(6) brought => were brought: đc mang

bring -brought -brought

(7) being given

of + N /Ving

@linanguyenpham