小学现在完成时是英语语法中的一个重要时态，也是学生们初步了解英语语法的重要内容之一。为了帮助小学生更好地掌握现在完成时，专项训练题是必不可少的，下面就为大家介绍一些小学现在完成时的专项训练题及答案。

1. 请根据句意和提示填写现在完成时的动词形式：

（1）I _____ (read) three books this month. (提示：本月已经过去了一段时间)

答案：have read

（2）She _____ (not finish) her homework yet. (提示：现在还没完成)

答案：has not finished

（3）They _____ (just arrive) at the airport. (提示：刚刚到达)

答案：have just arrived

（4）We _____ (play) basketball for two hours. (提示：一直在打了两个小时)

答案：have been playing

2. 请根据句意和提示改写成现在完成时：

（1）I started to learn English two years ago. (提示：到现在已经学了两年)

答案：I have learned English for two years.

（2）Tom has a new car. He bought it last week. (提示：上周买的)

答案：Tom has a new car. He bought it last week.

（3）My sister went to the cinema with her friends. (提示：刚刚看完电影回来)

答案：My sister has come back from the cinema with her friends.

（4）The children had a picnic in the park yesterday. (提示：昨天发生的事)

答案：The children had a picnic in the park yesterday.

以上是小学现在完成时的专项训练题及答案，希望能够对小学生在掌握现在完成时方面有所帮助。当然，学习语法最重要的还是理解其用法和规律，只有通过不断地练习和运用，才能真正掌握语法知识。