这条路不通，我们得换一条路走。

Zhè tiáo lù bù tōng, wǒmen děi huàn yì tiáo lù zǒu.

This road is blocked; we have to take another one.

这条路不通，我们走那边吧。

Zhè tiáo lù bù tōng, wǒmen zǒu nàbiān ba.

This road is blocked; let's go that way.

我给他打了几次电话，都没打通。

Wǒ gěi tā dǎ le jǐ cì diànhuà, dōu méi dǎtōng.

I called him several times, but none of the calls went through.