Long-term goals are more powerful a tool to drive young people on through their life time.
请问这个句子有语法错误吗？可以这么表达吗？
这种结构是正确的，容易见到的。限定词之前的修饰语大致上可以分为这么几类：
第一，all和both：allthe books,allthat work,boththe houses,bothmy parents
第二，分数：half / a quarter / one thirdhis share of the legacy
第三，倍数：She earnstwo timesthe salary I earn
第四，such和what：It wassucha disaster.Whata disaster it was!
第五，as/so/how/too/this/that + 形容词 + a + 单数名词结构：Itsso gooda bargain I cant resist buying it.
第六，more和less：This ismore seriousa problem than the other.
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回话语法探讨：我有点惊讶，由于看到这个问题时我直觉上感觉这种结构阅读时常常遇见。实证如下：
其一，The Cambridge Grammar p.435介绍了这种结构。
其二，在Corpus of Contemporary American English中搜索这种结构，得八十多句例证，摘录如下：
Off-roadingseemsmoreaccurateametaphorin these tough economic times.
There isnomorewonderfulareactionin all of golf for a former Open champion than the walk up the 18th hole each day.
Assuming that negotiations are appropriate in all cases would benomorevalidatheorythan one that assumes they never are.
There is no doubt that aflatoxin, gram for gram, ismuchmorepotentacarcinogenthan saccharine, gram for gram.
这种结构常常作表语，但主语也是可以的：
Moreimmediateaproblemwas the horde of howling barbarians clustered across the river.