Alright, now we've covered the three alphabets that are used in everyday Japanese, we can start looking at what a simple sentence in Japanese might look like.
Here's a really simple sentence:
これ は ペン です
Kore wa pen desu
This is a pen
Spaces have been added to make it easier to see the different elements. One key thing to note about this sentence is the lack of Kanji, part of what makes it simple is the fact it's only got Hiragana and Katakana.
Now lets break it down. This sentence uses the particle は or wa to set the subject, in this case you're talking about "this". The wa particle in Japanese is an incredibly important one as it sets the subject for the sentence that follows, and unlike English, once the subject is set in Japanese you don't have to continue to refer to it at all, unless the subject is changed to something else. Once the context is established, you can omit it and continue to describe it or otherwise talk about it in following sentences without specific reference. Think of the direct translation of wa in this context as being a bit like "as for" i.e "as for this" or "talking of this". Kore translates to "this" and is pretty much only written in Hiragana.
Now let's move onto the second part of the sentence, which is a bit easier to wrap your head around. ですor desu is the verb "to be" and in this sentence translates literally to "is". As you can see, in your normal sentence of japanese, the verb comes at the end of the sentence. ペンis literally "pen" spelt out in Katakana.
This "X はYです" or "X is Y" sentence structure can be applied to more than just this is a pen.
Here's another example, this time with kanji too:
トム は 中国人 です
Tomu wa chuugokujin desu
Tom is Chinese
Why not give using this structure a go yourself? Use google translate to find some words to fill in the X and Y of the structure.