【病句诊断】

He was absorbed to draw a picture.

他正在聚精会神地画一幅画。

【辨析讲解】

句中的关键动词absorb后面是不能接动词不定式的，那么，只能用be absorb in doing sth。

【诊断结果】

He was absorbed in drawing a picture.

【举一反三】

She was absorbed in singing and dancing.

她热衷于歌舞。