Could you give us the context of these sentences? I first and second sentences are difficult to explain because they are referring to a bigger part of the story. From what I can tell, 1) means something like "We were so afraid/cowardly and weak that we could not fight" And 2) seems to be similar to a common phrase in english that goes "between a rock and a hard place," which means that a person is in a very difficult situation. 3) is a common phrase that means a person is being rude, or ignoring another. and 4) "it" I'm assuming is referring to some sort of creature or monster, like an octopus or squid? The tentacles are the long arm-like things, so in the sentence "it" is moving the arms outwards.

Both "continue" and "keep on" mean the same thing, but "continue" is more formal. "Keep on" is more slang, or informal and you would only use it to speak to friends to say something like "keep on working" or "keep on trying." "Keep going," and "Go on," also mean the same thing, but they, too, are more informal than "continue."

Since has a couple of meanings. The most common use is to mean "from a time in the past, until a more recent moment." Like in the sentence: I have been waiting here since 6:00. This means the person has been waiting from 6:00 until the present moment. Since can also mean "because" like in the sentence: Since I lost my keys, I can't drive. This means that because the person lost their keys, they cannot drive.

Usually "when" is connected with time, but I think in this situation, "where" is referring to the location in the plot of the script.

This is a very difficult grammar lesson, even for native English speakers. Most English speakers don't get this right. In English, you should never end a sentence in a preposition (a word that describes a location: at, near, beside, on, in, etc.) Technically, the sentence should be "focus on the part in which I'm interested." But most English speakers would say "focus on the part I'm interested in" even though it's incorrect.

Try this: "Please inform us when the brochure changes are ready." Or if you are asking for a time when the changes will be ready you can ask: "Could you please inform us when the brochure changes will be ready?"

Even in America, "ain't" is seen as extremely slang. Many even argue whether it is a word or not. People stereotype American's from the country (the rural farmlands) as people who say "ain't" and don't know english. In general, "ain't" should be avoided. Instead, stick to words like "isn't," "won't," "or "hasn't."

I'm studying spanish, and at first, it was super difficult! The way I studied and learned it consisted of several steps. First, I basically translated every word just to read a short article or passage from a book. Once I could understand basics, I began reading news articles and I slowly became more and more comfortable with the language. Finally, I watched clips of news and that's how I'm trying to learn now! I think this process should work with any language. Good luck!