Dear Emma, I'm writing (1) ______ (invite) you to my birthday party next Saturday. As you know, I'll...

Dear Emma, I'm writing to invite you to my birthday party next Saturday. As you know, I'll be sixteen, so this is going to be a very special occasion for me. I’ve invited almost all of my friends and I really hope they'll all be able to come. Could I ask you to help me with the preparations, though? I would like to decorate the house with white and pink flowers, but I'm afraid I won't have time to do everything by myself. I've also decided to make my own cake and I'll certainly need your help with that! Please write back soon and let me know if you can make it. Best wishes, Sandra

1. to invite
2. to come
3. ask
4. to help
5. to decorate
6. have
7. to make
8. know

Certainly! Let's fill in the blanks in this letter with the appropriate verb forms.

1. (to invite) - Dear Emma, I'm writing to invite you to my birthday party next Saturday.
2. (to come) - I’ve invited almost all of my friends and I really hope they'll all be able to come.
3. (ask) - Could I ask you
4. (to help) - to help me with the preparations, though?
5. (to decorate) - I would like to decorate the house with white and pink flowers, but I'm afraid I won't
6. (have) - have time to do everything by myself.
7. (to make) - I've also decided to make my own cake and I'll certainly need your help with that!
8. (know) - Please write back soon and let me know if you can make it.

Let's break down why each verb form fits in its respective blank:

1. (to invite): The verb "writing" is followed by an infinitive verb form "to invite" to indicate the purpose of the writing.
2. (to come): The phrase "able to" is used to express ability or possibility and is followed by the base form of the verb, which is "to come."
3. (ask): "Could I ask you" is a polite way to make a request. The verb "ask" follows the modal verb "could" in its base form.
4. (to help): After "ask," when requesting assistance, the verb takes the infinitive form, thus "to help."
5. (to decorate): "I would like" is followed by the infinitive form of the verb, "to decorate," to express a desire or intention.
6. (have): "Won't" is a contraction for "will not," and is followed by the base form of the verb, "have."
7. (to make): "Decided" is followed by an infinitive verb form, "to make," to indicate a decision about an action.
8. (know): "Let" is followed by the base form of the verb "know," as in "let me know."

In summary, the letter is an invitation from Sandra to Emma, asking her to attend a birthday party and help with preparations. The verbs are primarily in their infinitive forms where required by English grammar rules, specifically after certain verbs, modal verbs, and phrases that indicate purpose or intention.