Lan likes best Robert Pattinson, the actor playing Edward Cullen in the Twilight Saga - Robert Pattinson, who

 =>Robert Pattinson, who played Edward Cullen in the Twilight Saga, Lan likes best

Nam has learned Malay since he came back from Malaysia -

=> Nam began learning Malay when he came back from Malaysia.

The workers painted their house yellow -

=>They had the workers  painted their house yellow.

May I use your calculator for a while? 

- Would you mind if I use your calculator for a while ?

Hard work can lead to big success 

=>If you work hard, it can lead you to big sucess.

1, Robert Pattinson, who is the actor Lan likes best, played Edward Cullen in the Twilight Saga.

2, Nam began learning Malay when he came back from Malaysia.

3,They had the workers paint their house yellow.

4, Would you mind if I used your calculator for a while ?

5, If you work hard, it can lead you to big sucess.