英语:1.Mrs Green doesn't seem to like the idea.= Mrs Green see

英语:1.Mrs Green doesn't seem to like the idea.= Mrs Green seem not to like the idea.
请问上面的两个句子是一样的,那么是不是否定不定式的句子都能有这样两种表达方式呢?比如:the teacher ask us not to talk in class.能不能这样表达the teacher doesn't ask us to talk in class.
2.what great fun it is to visit Disneyland!
3.what a great time they have chatting with each other during lunchtime!请问第2个句子后面的to是不定式对吧,那第3个句子能不能将 chatting 换成to chat