[字辨] 半途而廢是by half或by halves?

[geofrania (三葉蟲)]

想請問：

1.一半

by half

by halves

單複數有差別嗎？

哪一個是標準用法？

half作可數或不可數都可以嗎？

2.不要半途而廢

Never do things by halves.

Never do anything by halves.

單複數有差別嗎？

哪一個又才是標準用法？

謝謝

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推 gcgaryyoyo: by halves.  By half是非常的意思