Uzatma kablosu yoksa, lütfen cihazı pencere kenarına taşıyalım.

In this sentence, yoksa = “if there isn’t/if there’s no …” (the conditional form of the negative existential yok). So: “If there’s no extension cable …”

Yes, yoksa can also mean “otherwise/or else,” linking two clauses:

• Hemen gel, yoksa geç kalacağız. = “Come at once, otherwise we’ll be late.”

Context and intonation tell you whether it’s “if not” or “otherwise.” Here it’s clearly the conditional “if there isn’t …,” because it’s followed by a suggested action.

Taşıyalım is the 1st‑person plural optative (“let’s …”). It suggests a cooperative, polite action: “let’s move it.” It’s softer than a direct command.

• taşı = imperative to one person (“move (it)!”), blunt if used alone.
• taşıyın = imperative to you‑plural/you‑formal (“please move (it)”), firm but polite.
• taşıyalım = inclusive suggestion (“let’s move it”), often used to soften a request, even if the speaker might not literally help.

Lütfen means “please” and softens commands/requests. It’s flexible in position:

• Lütfen cihazı … taşıyalım.
• Uzatma kablosu yoksa, lütfen cihazı … taşıyalım.
• Cihazı … lütfen taşıyalım. All are fine; placing lütfen before the main request is most common.

Because it’s a specific, definite object (“the device”). Turkish marks definite direct objects with the accusative:

• Cihazı taşıyalım. = “Let’s move the device.” (a particular one)
• Cihaz taşıyalım. = “Let’s move a device/devices.” (non‑specific)

Uzatma kablosu is an indefinite noun‑noun compound (belirtisiz isim tamlaması):

• modifier noun + head noun with 3sg possessive: uzatma
  • kablo‑su. You can’t say uzatma kablo; the compound requires -sI on the second noun.

Both are possible:

• pencere kenarına = indefinite compound (“to the window side/edge” in a generic sense).
• pencerenin kenarına = definite (“to the edge of the window,” a particular window). In everyday instructions, the generic pencere kenarına is natural.

It’s a buffer consonant used when a possessed noun (with 3sg -sI) takes a case suffix:

• kenar‑ı (its edge) + -a (to) → kenar‑ı‑n‑a. Other examples: kapı‑sı‑n‑a (“to its door”), son‑u‑n‑da (“at its end”).

Yes, depending on the spatial nuance:

• pencere yanına = “to the side of the window / next to the window.”
• pencere önüne = “in front of the window.”
• pencere kenarına often means “right by the window/at the window edge,” common for placing things close to the window.

A comma after a fronted conditional clause is standard and helps readability:

• Uzatma kablosu yoksa, … You can also place the conditional later: Lütfen cihazı … taşıyalım, uzatma kablosu yoksa. Fronting it is more typical.

Yes. Possessive marking changes the perspective:

• Uzatma kablosu yoksa … = “If there isn’t an extension cable …” (general)
• Uzatma kablomuz yoksa … = “If we don’t have an extension cable …” To address the listener: Uzatma kablonuz yoksa … = “If you don’t have …”

Var = “there is/are.” With the conditional:

• Uzatma kablosu varsa, onu kullanalım. = “If there is an extension cable, let’s use it.” Paired with yoksa/varsa you can give alternatives: Uzatma kablosu varsa kullanalım; yoksa pencere kenarına taşıyalım.

Colloquially, people sometimes shorten uzatma kablosu to uzatma in context:

• Uzatma yoksa, … can be understood as “If there’s no extension (cable) …” In careful or formal speech, prefer the full uzatma kablosu.

Yes:

• kablo‑su: last vowel o (back, rounded) → -su.
• cihaz‑ı: last vowel a (back, unrounded) → -ı.
• kenar‑ı‑na: last vowel before suffix chain is ı (back) → dative -a, with buffer -n- after -ı.
• taşı‑y‑alım: last vowel of stem ı (back) → optative -alım, with buffer -y- after the vowel‑final stem.