YOU SAID:

i have to do a lot of work

INTO JAPANESE

私は多くの仕事をしなければならない

BACK INTO ENGLISH

I have to do a lot of work

INTO JAPANESE

私はたくさんの事をしなければならない。

BACK INTO ENGLISH

I have to do a lot of things.

INTO JAPANESE

私はたくさんの事をしなければならない。

BACK INTO ENGLISH

I have to do a lot of things.