Let's transform each sentence into the specified form:
Exclamatory : Exclamatory sentences express strong emotion. To convert the statement "It is kind of you to invite us" to an exclamatory form, you might say: "What a kind gesture it is to invite us!"
Interrogative : Interrogative sentences ask questions. To make "It was foolish of him to behave like that" into a question, you could say: "Wasn't it foolish of him to behave like that?"
Interrogative : Similarly, we can turn "Please send this letter by tomorrow" into a question by asking: "Could you send this letter by tomorrow, please?"
Assertive : Assertive sentences make statements or express opinions. The assertive form of "Did we not have great fun together?" is: "We had great fun together."
Interrogative : To make a question out of "Tomorrow being a holiday the school is closed," you might ask: "Is the school closed tomorrow because it is a holiday?"
Exclamatory : To make "That is a beautiful painting" exclamatory, you could say: "What a beautiful painting that is!"
Imperative : Imperative sentences give commands or requests. The imperative form of "If you do not hurry up, you will miss the bus" could be: "Hurry up, or you will miss the bus."
Assertive : To convert the exclamatory sentence "What a fine gentleman he is!" into assertive form, you could express it as: "He is a fine gentleman."