bytheendof用一般過去時。

by the end of用法：用作及物動詞，也可用作不及物動詞，在用作不及物動詞時，常常與介詞或副詞構成短語; 用作及物動詞時，通常接名詞或代詞作賓語。可用於被動結構。

in the end 可用於多種時態的句子，不是某一個時態的“標識”。

介詞詞組 in the end 是一個慣用法（idiomatic usage），意思是“最後”、“最終”等。只要語義表達需要，可以用在一般現在時、一般將來時、過去時、完成時......的句子裡。看例句：

In the end, it's not the years in your life that count. It's the life in your years.

In the end, we will remember not the words of our enemies, but the silence of our friends.

In the end, they decided to just be“real friends”so that they could raise kids together.

Many people wish they hadn't damaged their marriage in the end.

I've been working really hard and passed the exam in the end.

通過上面的例句可見，in the end 不是哪一個時態的標識。