關於英文for用法的問題。?

1.A depressed person feels sad and hopeless for long periods of time. 2.They went through a long period of slavery in Egypt. 請問知識大大們,上述兩句為什麼第一句有for(for long periods of),而第二句卻不用加for呢?謝謝。: ) 3.Professional magicians have to study for a long time. 4.Tricks like that take a long time to... 顯示更多 1.A depressed person feels sad and hopeless for long periods of time.
2.They went through a long period of slavery in Egypt.
請問知識大大們,上述兩句為什麼第一句有for(for long periods of),而第二句卻不用加for呢?謝謝。: )

3.Professional magicians have to study for a long time.
4.Tricks like that take a long time to learn.
請問知識大大們,上述兩句為什麼第三句有for(for a long time),而第四句卻不用加for呢?謝謝。: )
3 個解答 3