第一句肯定是錯的.因?yàn)闀r態(tài)就不對,主語he是第三人稱單數(shù),如果該句用一般現(xiàn)在時的話,動詞worry要變成worries,表單數(shù),如果是用過去時的話,那就要變成worried,不能簡單用worry.
他經(jīng)常擔(dān)心他兒子的學(xué)習(xí),正確表述是：
He often worries about his son's studies.但這個很少用.worry about擔(dān)心－－－,表示動作,很少用
He is often worried about his son's studies. be worried about固定短語,擔(dān)心－－－表狀態(tài),多用