Learn Arabic (Modern Standard): سأحجز فندقا وسنبقى هناك. - I will book a hotel and we will stay there.

The prefix سـ (sa-) means "will". To say "I book", the verb is أحجز ('ahjizu). When you add the future prefix, it connects directly to the alif, making سأحجز (sa-'ahjizu). It just joins onto the front without changing the spelling of the original verb.

Why is there an extra alif at the end of فندقا (hotel)?

The standard word for "hotel" is فندق (funduq). Because it is the object of the action (the thing you are booking), it takes an "an" sound at the end, called tanween fatha. In Arabic spelling, this ending usually requires you to add an extra alif to the end of the word, making it فندقا (funduqan).

How do we break down all the prefixes in وسنبقى?

Arabic loves to link small words to the beginning of verbs. This word has three prefixes attached before the core verb: و (wa-) meaning "and", then the future prefix سـ (sa-) meaning "will", and finally نـ (na-) meaning "we". Put together with the verb for "stay", it literally translates to "and-will-we-stay".

Why does نبقى (we stay) end with a letter that looks like a ي without dots?

That letter is called an alif maqsura (ى). It is a special form of the letter alif that is only used at the very end of certain words. Even though it is shaped like a yaa (ي), you pronounce it as a long "aa" sound. So, the word is pronounced "nabqaa".