be subject to或be subjected to?

請問在下列句子中應該用be subject to還是be subjected to才對？

1. Mr. Pence supports the Trump administration in its defense of American companies who have been (subject/subjected) to decades of illicit trade practices and unfair polocies.

2. Senior and disabled households who begin reciving housing subsidies after the proposal goes into effect will be immediately (subject/subjected) to the higher rents.

以上資料係截取自：

https://www.reddit.com/r/FormosaEnglish/comments/8...

謝謝！

Jenkin：

謝謝您的回答。

但我的疑問是：subject有時也可以當形容詞來用，例如：

3. If the plants are growing well, they'll be less subject to pests.

4. The agreement is still subject to approval by the Leage's 30 teams and the players. 

以上資料來源：

https://dictionary.cambridge.org/zht/%E8%A9%9E%E5%...