现在完成时是英语语法中的一个时态，它表示动作已经完成，但是与现在有关。以下是20个现在完成时的例句及其翻译：
- I have eaten breakfast already. 我已经吃过早饭了。
- We have seen that movie before. 我们之前看过那部电影。
- She has lived in New York for 5 years. 她已经在纽约居住了五年了。
- They have studied English for 3 years. 他们已经学了三年英语了。
- He has visited Paris twice. 他已经去过巴黎两次了。
- I have finished my homework. 我已经完成了我的家庭作业。
- We have been married for 10 years. 我们已经结婚十年了。
- She has lost her phone. 她已经丢了手机了。
- They have never been to Asia. 他们从未去过亚洲。
- He has just graduated from university. 他刚刚从大学毕业。
- I have already booked the tickets. 我已经预定了机票。
- We have had a great time on vacation. 我们在度假期间过得很愉快。
- She has broken her leg. 她已经摔断了腿。
- They have finished their project. 他们已经完成了他们的项目。
- He has lost weight recently. 他最近减轻了体重。
- I have never seen such a beautiful sunset. 我从未见过如此美丽的日落。
- We have already visited all the museums. 我们已经参观了所有的博物馆。
- She has learned how to cook. 她学会了如何烹饪。
- They have been waiting for hours. 他们已经等了好几个小时了。
- He has bought a new car. 他买了一辆新车。
以上是20个现在完成时的例句及其翻译。掌握现在完成时对于学习英语语法来说是非常重要的，希望这些例句对您有所帮助！
