too+形容词+to do sth:太…以至于不能…
形容词+enough to do sth:足够…能够做某事(注意三个句型有时可以互换)
He is so young that he can′t go to school.他如此年轻以至于不能去上学。
= He is too young to go to school. 他太年轻以至于不能去上学。
= He isn′t old enough to go to school.
another+数字+可数名词单数或复数:额外多少某物
He ate one apple,he wanted another two apples.他吃了一个苹果,还想再要两个