现在完成时是英语语法中的一个时态，表示动作或状态发生在过去，并且与现在有关。下面是30个常用的现在完成时例句：
- I have finished my homework.
- He has been to Paris twice.
- They have never visited New York.
- She has just graduated from college.
- We have lived in this house for ten years.
- He has lost his phone again.
- They have already started the project.
- She has read that book before.
- We have seen that movie three times.
- I have never eaten sushi.
- He has traveled to many countries.
- They have been married for five years.
- She has worked here since 2010.
- We have studied English for six years.
- He has had a cold for a week.
- They have bought a new car.
- She has finished her degree.
- We have cleaned the house today.
- He has learned how to play guitar.
- They have visited their grandparents.
- She has cooked dinner for us.
- We have had a great time at the beach.
- He has forgotten his keys at home.
- They have completed the task on time.
- She has met her favorite actor.
- We have booked our flights for the vacation.
- He has checked his email this morning.
- They have decided to take a break.
- She has won the competition.
- We have celebrated our anniversary.
以上这些例句展示了现在完成时的用法和常见的动词形式，通过学习这些例句，我们可以更好地理解并运用现在完成时。
