빈도부사/시간대별 표현/조동사와 비슷한 일반동사 표현/현재완료 전치사

<빈도부사>		<시간대>
always	100%	in the morning
usually	70-90%	in the afternoon
frequently = often	50-70%	in the evening
sometimes	30-50%	at the night
occasionally	30%

---

 

three days ago (○) / three days before (○) / three days in advance (○)

before three days (X) → before 뒤에는 특정 시점만 가능.

will = be going to / be likely to
can = be able to
should / must = have to

for/over/in/during + the last/the past + 기간 현재완료와 짝꿍

어려운 문제에 직면해오고 있다. 현재완료진행
= have faced challenges
= have been facing challenges
= have been faced with challenges → be faced with N = face

By the time S V - 1. 현재 동사 → [주절] will have p.p. (그 영화는 이미 시작했을거야.)
                     - 2. 과거 동사 → [주절] had p.p.

• regularly     : 정기적으로
  periodically 
  
  
• postpone
  put off       : 연기하다, 미루다
  delay
  defer
  
  
• make expertise in : -의 전문 지식을 쌓다
  
  
• professional : 전문가   [ professional ⓐ : 직업상의, 전문적인 ]
  expert
  specialist
  
  
• shortly : 곧
  soon
  
  
• represent : 대표하다
  be representative of N
  
  
• reserve : 예약하다
  make a reservation for
  
  
• work
  operate : 작동하다
  run
  
  
• replace / substitute A with B  : A를 B로 대체하다
                            B  for  A