YOU SAID:

I have a few pieces of grass

INTO JAPANESE

私は草のいくつかの部分を持っている

BACK INTO ENGLISH

I have some parts of the grass

INTO JAPANESE

私には草の一部があります

BACK INTO ENGLISH

I have a part of the grass

INTO JAPANESE

私は草の一部を持っています

BACK INTO ENGLISH

I have a part of the grass