YOU SAID:

head in the trunk, will definitely sunk

INTO JAPANESE

頭がトランクにある、間違いなく沈むだろう

BACK INTO ENGLISH

My head is in the trunk, it's definitely going to sink.

INTO JAPANESE

私の頭はトランクの中にあり、間違いなく沈みます。

BACK INTO ENGLISH

My head is in the trunk and it definitely sinks.

INTO JAPANESE

頭がトランクの中にあり、確実に沈みます。

BACK INTO ENGLISH

My head is in the trunk and I'm sure it will sink.

INTO JAPANESE

頭がトランクの中にあるので、きっと沈んでしまいます。

BACK INTO ENGLISH

My head is in the trunk, so I'm sure I'll sink.

INTO JAPANESE

頭がトランクに入っているので、確実に沈みます。

BACK INTO ENGLISH

Since your head is in the trunk, you are sure to sink.

INTO JAPANESE

頭が胴体に入っているので確実に沈みます。

BACK INTO ENGLISH

Since the head is inside the body, it will definitely sink.

INTO JAPANESE

頭は体の中にあるので確実に沈みます。

BACK INTO ENGLISH

Since the head is inside the body, it will definitely sink.