Я закажу чай без сахара и буду ждать друга у окна.

I will order tea without sugar and will wait for my friend by the window.

Breakdown of Я закажу чай без сахара и буду ждать друга у окна.

• друг: the friend
• я: I
• и: and
• у: by
• окно: the window
• чай: the tea
• без: without
• ждать: to wait for
• сахар: the sugar
• заказать: to book / to order

Questions & Answers about Я закажу чай без сахара и буду ждать друга у окна.

Why is закажу used instead of заказываю or закажу буду?

Закажу is the perfective verb заказать in the simple future (1st person singular). Perfective verbs form future with a single word (закажу, закажешь, закажет...) and usually mean a completed, single action (placing an order once).
Заказываю is imperfective present and can sometimes mean a near-future plan in conversation, but here закажу is the standard, clear choice.

Why does the second verb use буду ждать instead of a one-word future like подожду?

Ждать is imperfective, so its future is made with быть + infinitive: буду ждать. This emphasizes an ongoing process (waiting for some time).
A one-word future like подожду (perfective) would sound more like wait for a while / wait a bit / finish the waiting, which can change the nuance.

Why is друга in the genitive case, not accusative?

With ждать, Russian most often uses the genitive: ждать кого? чего? → ждать друга, ждать поезда.
Accusative is possible in some contexts (often when the object is very definite/expected), but genitive is the default taught and widely used, especially in neutral sentences like this.

Why is у окна (genitive) used instead of something like около окна or на окне?

У + genitive means by/near/at (someone or something): у окна = near the window.
Около окна is similar but a bit more explicit as next to/close to and can feel slightly more “spatial/physical.”
На окне means on the window (on its surface), which is a different idea.

What case is окна, and how do I know it’s genitive?

Окна here is genitive singular of окно. You know because the preposition у requires genitive. Also, окно is a neuter noun and its genitive singular ending is -а: окно → окна.

Why is без сахара genitive, and not something like без сахар?

Без always takes the genitive: без чего? → без сахара, без молока, без времени.
So the base form сахар changes to сахара in genitive singular.

Why is чай not changed to some other form?

Чай is the direct object of закажу (to order what?), so it’s in the accusative. For many masculine inanimate nouns, accusative = nominative, so it stays чай (not visibly changed).

Is the subject я optional here? When would I include it?

Yes, Russian often drops subject pronouns because the verb ending shows the person: закажу already implies I.
You’d include я for emphasis/contrast, e.g. Я закажу чай, а он — кофе (I’ll order tea, and he’ll order coffee).

Does и simply mean and, and can it connect two different actions like this?

Yes. И commonly links two verbs/actions with the same subject, even if the tenses/aspects differ: закажу ... и буду ждать .... This is a natural way to show a sequence of planned actions.

Is there anything special about the word order буду ждать друга у окна?

It’s neutral and natural. A few common variations shift emphasis:

• У окна буду ждать друга (focus on location: by the window)
• Друга буду ждать у окна (focus on whom you’re waiting for)
  Russian word order is flexible, but the cases keep the meaning clear.

How do I pronounce/stress the tricky parts of this sentence?

Key stresses: я закАжу чай без сАхара и бУду ждАть дрУга у окнА.
Notes: ждать has a long-ish жд cluster (roughly zhd), and окна is stressed on the last а: окнА.