他本来很安静，认识你以后变得开朗多了。

Tā běnlái hěn ānjìng, rènshi nǐ yǐhòu biànde kāilǎng duō le.

He used to be very quiet, but after meeting you he became much more outgoing.

我本来想去公园，但是下雨了。

Wǒ běnlái xiǎng qù gōngyuán, dànshì xiàyǔ le.

I originally wanted to go to the park, but it rained.

我本来是想去美国留学的。

Wǒ běnlái shì xiǎng qù Měiguó liúxué de.

Originally I wanted to study abroad in America.