Эта фраза построена в сослагательном наклонении настоящего времени. Present Subjunctive употребляется для выражения (и подчёркивания) настоятельности, важности, желательности, требования, приказа, предложения
Present Subjunctive употребляется после подобных выражений с обезличенным «It»: It is required, it is important, it is necessary и т.п. А также в придаточных предложениях, дополняющих такие глаголы, как to order, to command, to suggest, to agree to decide.
Present Subjunctive употребляется в основном в официальной устной и письменной речи, чаще в американском английском, чем в британском английском. Форма Present Subjunctive – это базовая форма глагола (без частицы "to") для всех лиц: I be, he be, she be, it be, we be, you be, they be; I go, he go, she go, it go, we go, you go, they go.
It is necessary that he do it immediately.
It is required that everything be ready by three o'clock.
It is important that she take this medicine every six hours.
We decided that another plan be prepared.
Объяснение:
Hi Matthew,
I'm writing to invite you to my birthday party that will be organised on May 25th at my home. We are going start at 8PM so please don't be late and dress up correctly as it's going to be a thematic party. By the way, the theme is called "Horror Story" and I hope you will choose something really frightening from your wardrobe. We are also going to play various active games and dance a lot so you should take it into consideration too. If you don't know how to get to my place you can give me a call and I'll provide you with all the details. I'll be happy to see you here! Have a nice day!
See you soon,
Daphne