YOU SAID:

i am so brilliant at mowing the big lawn

INTO JAPANESE

私は大きな芝生を刈るのがとても上手です

BACK INTO ENGLISH

I'm very good at mowing large lawns

INTO JAPANESE

広い芝生を刈るのが得意です

BACK INTO ENGLISH

Good at mowing large lawns

INTO JAPANESE

広い芝刈りが得意です

BACK INTO ENGLISH

Good at mowing large lawns