I first went to school on my fourth birthday.强调句型It was on my fourth birthday that I first went to school .你给的这个句子不是强调句，而是【that引导的定语从句】，其中that经常省略,定冠词是必须的。It was the first time that I went to school on my fourth birthday句子结构替换：sb first do sth=sb do sth for the first time=It was the first time that sb do sth I...
