`-` A boy was trapped for two hours under the debris of the earthquake yesterday

`-` When the rescuers arrived , the whole family had already evacuated

`-` He has been weakened badly by his unhealthy diet

`-` Robots will do all the housework in 20 years time

`-` His unhealthy diet has weakened him badly

`-` CT :

S + was/were + V-II

When + S + V2/V-ed

S + has/have + V-II

S + has/have + been + V-II

S + will/won't + V-inf

$baoyen.$

Đáp án+Giải thích các bước giải:

yesterday / A boy/was trapped / for two hours/ under the debris/ of the earthquake. 

→ A boy was trapped under the debris for two hours yesterday of the earthquake. 

When / rescuers / the / arrived, / the whole family / had / evacuated. / already 

→ When rescuers had arrived , the whole family  the already evacuated. 

He / been / badly / his / diet. / has / weakened / unhealthy / by 

→  He unhealthy been by his has weakened badly  diet.

Robots / do / the housework / will / in / 20 / years time. / all 

→ Robot will do all in 20 years time

His / diet / has / him / badly. / unhealthy / weakened

→ his diet  unhealthy weakened has him