plant的过去分词和过去式

All plants need light and water.
一切植物都需要阳光和水。
These plants need heat and humidity to grow well.
这些植物在高温潮湿的环境中才能生长得旺盛。
The company has been investing in new plant and equipment.
这家公司一直在投资购置新机器和设备。