请分析英文句子结构,WhenEuropeansbeganarrivinginNewZealand,theybroughtwiththemalienplants—cropsandgardenplants.当欧洲人抵达新西兰时,带来了异域植物——农作物以及园林植物.

Question

请分析英文句子结构,
When Europeans began arriving in New Zealand,they brought with them alien plants — crops and garden plants.
当欧洲人抵达新西兰时,带来了异域植物——农作物以及园林植物.

Answer 1

When Europeans从主 began arriving从句谓语动词短语 in New Zealand从句状语,（时间状语从句）they主句主语 brought 谓语（with them伴随状语） alien plants宾语 — crops and garden plants.（破折号后面的名词短语进一步说明宾语,但好像不能理解为同位语）