some parents worrey very much that their children will amoun

some parents worrey very much that their children will amount to nothing since they are given to daydreaming in decision,and they show no promise of being a doctor,lawyer or manager.
1,怎样理解整句子结构?
2,Amount to 的应用
3,翻译整句

some parents主语
worry谓语
very much 宾语
that their children will amount to nothing since they are given to daydreaming in decision, and they show no promise of being a doctor, lawyer or manager. 宾语的同位语
their children will amount to nothing 宾语的同位语的主句
since they are given to daydreaming in decision, and they show no promise of being a doctor, lawyer or manager. 宾语的同位语的原因状语从句
amount to
总计,达到,结果是
例句
To amount to; total.
总计达；总数有
My savings amount to $2000.
我的储蓄共达2000美元.
It may amount to nothing.
它可能没有什么效果.
Accusations that amount to an indictment.
等同于是起诉的控告
Be definite as to the amount.
对其额度要非常肯定.
一些家长担心他们的孩子将会一事无成,因为在作决定时象做白日梦,他们也没有表现出想成为医生、律师或经理的迹象.