他的想法尚未成形，缺乏清晰的结构。

His ideas are still ___unformed and lack clear structure.

他的写作技巧还很稚嫩，需要更多的练习来提高。

His writing skills are still ___unformed and need more practice to improve.

他的想法还很混乱，缺乏条理。

His thoughts are still ___unformed and lack organization.