Unless的用法

正確句 Don't cross the street without looking both ways first. 假如我改成 Don't cross the street unless looking both ways first. 為何會錯 . 可不可以如此解釋 假如用 unless 為連接詞 且 don't cross the street 已經省略 主詞,故 此時 用unless looking both ways first 就沒有主詞了 故若要改成 unless looking both ways 需要加主詞 you Don't cross the... 顯示更多 正確句
Don't cross the street without looking both ways first.

假如我改成
Don't cross the street unless looking both ways first.
為何會錯
.
可不可以如此解釋 假如用 unless 為連接詞 且 don't cross the street 已經省略 主詞,故 此時 用unless looking both ways first 就沒有主詞了
故若要改成 unless looking both ways 需要加主詞 you
Don't cross the street unless you look both ways first.

以上我的理解是否正確
請各位大大解謎惑 謝謝
4 個解答 4