YOU SAID:

The tree fell unexpectedly short.

INTO JAPANESE

木が意外と短くなった。

BACK INTO ENGLISH

The tree has become shorter than I expected.

INTO JAPANESE

思ったより木が短くなりました。

BACK INTO ENGLISH

The tree is shorter than I expected.

INTO JAPANESE

木は思ったより短いです。

BACK INTO ENGLISH

The tree is shorter than I expected.