The best sentence would be the first one "I just need Sam's approval." If you wanted to use approbation you would basically make the same sentence but switch the words, "I just need Sam's approbation." or you could say, "I just need the approbation of Sam." "by Sam" doesn't work. The biggest difference between approval and approbation is honestly just commonality. You're very unlikely to hear someone say approbation in casual conversation or even in business because it is very formal and pretty uncommon. Grammatically approbation is a little stronger than approval and is more about the act of approving. Approval is more about giving permission or acknowledging someone or something. They are synonyms and are interchangeable but I would recommend using approval rather than approbation because approval is easier to fit into a regular sentence and it is way more common especially in spoken American English. Hope this helps!

Well said!

Something that is very important to know for you as a Japanese speaker learning English is that English doesn't have as specific rules about formality as Japanese does. Also, if you say something informally in a formal situation in English the consequences are pretty minor unless you were rude. To your question, yes, you can say "Go for it." in a formal situation. It does sound like something you'd say to a friend but it's not impolite.

As written your text is correct. You could reword it but it would just be different not more or less correct. I will say the last two sentences seem a little short and almost unfinished but they very well might be fine in the larger context of whatever it it's you're writing. If you'd like to know what other sentence options might be I can write some down. Otherwise, well done!

This is a comparison sentence "...as...as..." A simple version of the same type of comparison sentence would be "He is as tall as his brother." The example sentence is comparing two people and one adjective. The difference in this sentence you're asking about is comparing two people and two things. If I changed my example sentence to be the same way I could say, "He is as tall as his brother is fat." This sentence doesn't mean that his height is the same as the width of his brother it's more relative. It means he is very tall, and his brother is very fat. Your example sentence means that their skills are opposite but equal intensity. He was very experienced and his brother was very green (green meaning unskilled). I hope that answers your question. Keep learning!

You may be looking for the word 'misconception' but it depends on the context. For example There is a misconception that English is the official language of the United States. If that word doesn't work for you try looking at a thesaurus (you can find many online) it will show you synonyms for words you already know. I hope this helped!

Hello! Using prepositions depends greatly on if you're using the for time or for place. And, of course, for both situations there are exceptions. Time For example, when talking about prepositions of time it depends on how specific you're being. 'On' is usually used for anything with a day. Example, on Wednesday, on June 19th, on May 3rd 1982, etc. 'In' is usually used when you're referring to a month or a season. Example, in April, in summer, in the winter of 1851. 'At' is used for a specific time. Example, at 2 o'clock, at 4pm, at midnight. *NOTE* if you are using all of those then sometimes one rule cancels another and other times you need more than one preposition. Like with a date you use 'on' even though the month is included but if you also have a time you need both 'on' and 'at' Example. "The wedding will be held on Monday, December 12th, 2021 at 7pm in the evening." There are some exceptions of course. For time of day they have their own rules, "in the morning," "in the afternoon," "in the evening," but we say, "at night." Place 'In' is usually used to mean inside. Example, in my bag, the card is in the envelope, it's in the house. However, there are exceptions we sometimes say 'in' for parks (The party is happening in the park later today) but 'at' could also work in that sentence. 'On' is usually used to mean on top of. Example, the keys are on the table, the book is on the shelf, there's a bug on the floor. However, we also use 'on' for most shared transportation (on the bus, on a plane, on a train) 'At' is used to talk about a location generally without thinking about inside or outside. Example, "I left my keys at work," "I'm at school right now," "The sale is at 123 South Street" We almost always say "at home" because 'home' is the location but we can say, at/in my apartment or at/in my house depending on the context. This is a long answer but this is certainly better explained in a lesson with examples. I hope this longwinded post can help!

Yes. "How did you get to study in Germany?" could be used to ask about the process someone went through to obtain an opportunity. However, the person answering the question could also think of it as a general question and give a vague answer like, "I worked really hard." rather than giving a detailed answer about their process. In the case that the person answering doesn't give you the information you want all you have to do is ask for more details. Example. "How'd you get to go to graduate school in Germany?" "I had to study really hard and be focused on my goals." "That makes sense but, what was the process? Did you have to apply, was there a selection process? What specifically did you have to do?" The above example could easily be between two native speakers or two language learners. There's no issue with the question itself, sometimes the people talking just have different ideas of what is being asked. Good question!