Перестройте русские предложения в соответствии со строгим порядком слов в английском предложении. 1. Для меня очень трудны эти упражнения. 2. Завтра на научной студенческой конференции доклад будет делать мой друг. 3. Экзамены студенты сдают в конце каждого семестра. 4. Над английским он должен много работать. 5. Эту статью она вчера начала переводить на английский язык.

1. These exercises are very difficult for me.
Explanation: The word order in English sentences is subject-verb-object. In this sentence, the subject "these exercises" is followed by the verb "are" and the object "very difficult" is placed after the verb. The phrase "for me" indicates who finds the exercises difficult.

2. Tomorrow at the scientific student conference, my friend will give a presentation.
Explanation: Again, the subject "my friend" comes first in the sentence. The verb "will give" follows next, indicating the action of giving a presentation. The object "a presentation" is placed after the verb. The phrase "at the scientific student conference" is added after the verb to indicate where the presentation will take place.

3. Students take exams at the end of each semester.
Explanation: The subject "students" is followed by the verb "take" to indicate the action of taking exams. The object "exams" comes after the verb. The phrase "at the end of each semester" is added at the end of the sentence to indicate when the exams are taken.

4. He must work hard on English.
Explanation: The subject "he" comes first in the sentence. The verb "must work" indicates the necessity of working. The object "hard" is placed after the verb. The phrase "on English" indicates what subject he needs to work on.

5. She started translating this article into English yesterday.
Explanation: The subject "she" comes first in the sentence. The verb "started" indicates the action of starting. The object "this article" is placed after the verb. The phrase "into English" indicates the language she is translating the article into. The word "yesterday" indicates when the action took place.