IsDoneVsHasDone.txt
20210306

每日英語: is done vs has done.

The passive of the verb to do:
動詞被動式

Most of the work is done by me. [right, present tense]
大部分的工作由我完成. [正確的現在被動式]

Most of the work has done by me. 
[錯誤的語法]

Most of the work was done by me. [simple past, the work is finished] OR
大部分工作是由我完成的。 [簡單的過去被動式，工作現在完成了]或

Most of the work has been done by me. [present perfect, you started to do the work in the past and continue to do it now]
大多數工作已經由我完成。 [現在完成被動式，您從過去開始從事這項工作，現在繼續進行]

Trick, just for you: the simple past and present prefect are basically the same idea in Spanish. :)
有趣的是, 西班牙文中, 簡單現在式和現在完成式, 是同樣的意思.

Please note: The majority of is used for people. For work, we would say most of the work.
另外請注意, 通常會說 most of the work, 而不是單獨一件 work.