4 sentences

1. 现在已经没有回头路了。

   xiàn​zài yǐ​jīng méi​yǒu huí​tóu​lù le.

   There's no turning back now.

   Source: OpenSubtitles

2. 没有回头路可走。

   méi​yǒu huí​tóu​lù kě zǒu.

   There's no turning back.

   Source: OpenSubtitles

3. 没有回头路了。

   méi​yǒu huí​tóu​lù le.

   There is no turning back.

   Source: OpenSubtitles

4. 我们走错了，必须走回头路回那个交叉口。

   wǒ​men zǒu​cuò le, bì​xū zǒu huí​tóu​lù huí nà​ge jiāo​chā​kǒu.

   We went the wrong way; we have to backtrack to that intersection.

   Source: Dong Chinese Dictionary