完整的应该是
She says [that] she loved him //她说她曾经喜欢过他,但现在不喜欢了
He says [that] he loves her //他说他喜欢她
She 是主语
says是谓语动词
she loved him做宾语
宾语从句中that可以省略(规则很多可以搜搜十多条.偷懒的方法就是简单语义清晰的句子that可以省略,复杂的最好加上)
所以语法和意思都没问题She says she loves him 。He says he loves her。这样呢？最好谓语动词said，因为发生在过去有两种说法She said "I love you"She said that she loved her. //最好别省略that 不然会有歧义