I wrote the sentences below with contractions from.

I downloaded the VOA English Learning application because I read it was good for studying English study.

In this app, English news're is edited for English learners.

This function's very helpful for learners.

Some people do speak with this contraction, but rarely would it be used in written form.

I thought the speaker'd be a reading machine even though it has kinds of voice-like sounds and it pauses for breath.

Again, in spoken speech, people do say "speaker'd, " but usually it would be "speaker would" in written form.

Because I caught the words clearly even though I boosted the speed of speaking by 2 times.

That was strange to me since I know I usually can't catch all the English words in someone's speech.

I listened to other News sites, -- the speakers spoke very fast, but I wasn't uncomfortable even though I couldn't catch the words exactly.

I think the voices are humans'.

As a matter of fact, we can listen to what someone speakays on the video.

I'm wondering if reading machine voices can improve my ability to hear English.

When I check the pronunciaton of a single word, the reading machine's very helpful, but for long sentences, I'm not sure if it's still helpful.

Human voices have always have feelings and emotions, which can help me understand the conversations without subtitles in many cases.

I wrote the sentences below with contractions frorm.

I downloaded the VOA English Learning application because I read it was good for English study.

In this app, English news're is edited for English learners.

First of all, news is singular, so you would use "is" instead of "are".
Second, you can't attach conjunctions onto nouns. You can only attach them to I, you, he, she, it, we, and they.
They're coming to the park today. -> They are coming to the park today.
Sandra and Chris are coming to the park today. -> You can't say Sandra and Chris're coming... that sounds really awkward

This function' is very helpful for learners.

Same explanation that I said above - you can't use conjunctions with nouns.
Here's an example of the "is" conjugation:
He's working until 6. -> He is working until 6.

I thought the speaker'd be was a reading machine, even though it hasounds kinds of voice soundshuman and it pauses forto take breath.s.

If you wanted to say "I thought the speaker would be...", then that means you expected it to behave like that, so you should say "I thought it was a reading machine", because when you heard the voice, it sounded like a reading machine.

Here's an example of the 'd conjunction:
He'd have to leave early in order to get to the party on time. -> He would have to leave early in order to get to the party on time.

Because I caught the words clearly even though I boosted the speed of speaking by 2 times.

That was strange to me, since I know I usually can't catch all English words in someone's speech.

I listened to other Nnews sites, t. The speakers spoke very fast, but I wasn't uncomfortable, even though I couldn't catchunderstand the words exactcompletely.

I think the voices are humans's.

As a matter of fact, we can listen to what someone speakays on the video.

But unfortunately, we can't seeread English subtitles on those sites.

I'm wondering if reading machine voices can improve my ability to hearwith listening to English.

When I check the pronunciaton of a single word, the reading machine' is very helpful, but for long senteces, I'm not sure if it's still helpful.

This is why you can't use nouns and the conjunctions together.
When you say "the reading machine's", I know you want to say "the reading machine is", but in English we add 's at the end of nouns to show that they own something. For example:
I saw Jamie's dog yesterday. It's so cute!

I'm enjoying watching "Mind Your Language", an old British TV show, on yYoutube this week.

Human voices have always have feelings and emotions, which can help me understand the conversations without subtitles in many cases.