YOU SAID:

I appear to have invented a knife wielding tentacle

INTO JAPANESE

私は触手を振ってナイフを発明したようです

BACK INTO ENGLISH

I seemed to have invented a knife by waving tentacles

INTO JAPANESE

私は触手を振ってナイフを発明したようだった

BACK INTO ENGLISH

I seemed to invent the knife by waving my tentacles

INTO JAPANESE

私は触手を振ってナイフを発明したようだった

BACK INTO ENGLISH

I seemed to invent the knife by waving my tentacles