YOU SAID:

my cat said he wants a yellow duck

INTO JAPANESE

私の猫は彼が黄色いアヒルを望んでいると言った

BACK INTO ENGLISH

My cat said he wanted a yellow duck

INTO JAPANESE

私の猫は彼が黄色いアヒルが欲しいと言った

BACK INTO ENGLISH

My cat said he wanted a yellow duck