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1) Both structures with "yet" are correct, but they have slightly different focuses.
a) "He hasn't said yet how long..." - In this structure, the emphasis is on the fact that he has not said anything about the duration yet.
b) "He hasn't yet said how long..." - In this structure, the emphasis is on the word "yet," indicating that he has not said anything about the duration up to this specific point in time.
To determine the correctness of a sentence structure, you can follow these steps:
a) Identify the key elements in the sentence, such as the subject, verb, object, and adverbial phrases.
b) Determine whether these elements are placed correctly according to the rules of grammar and syntax.
c) Understand the intended meaning of the sentence and see if it aligns with the message being conveyed.
2) Both word orders are correct; it depends on the emphasis you want to give.
- "He spoke with the prime minister over the phone." - In this structure, the emphasis is on the fact that they spoke with each other.
- "He spoke over the phone with the prime minister." - In this structure, the emphasis is on the method of communication, highlighting that they spoke over the phone.
3) Yes, it is possible to use "hail" in the given context: "He arrived in the country to hail British troops." However, it's important to note that "hail" has several different meanings. In this context, "hail" means to enthusiastically acclaim or greet someone or something.
4) "Greet" and "congratulate" are not exactly synonyms, although they both involve expressing positive sentiments towards someone.
- "Greet" typically means to acknowledge and welcome someone upon meeting them or arriving somewhere. It can be a simple act of saying hello or extending a warm welcome.
- "Congratulate" implies offering congratulations or expressing admiration for an achievement, success, or milestone reached by someone. It goes beyond a mere greeting and is specifically related to praising someone for their accomplishment.
If you want to check the synonyms of a word, you can use a dictionary or thesaurus, where you'll find various words with similar meanings.
I hope this helps! Let me know if you have any more questions.