Question

按词的适当形式填空：look，the boys--------(swim)in the river. 2.there---(be) some water on

the table. 3.he---------(live) on the -------(two) floor

Answer 1

1、are swimming 因为有look，所以用一般进行时
2、is 时态是一般现在时，水是不可数名词，所以用is
3、lives;second 他现在住在第二层
其实2和3不好说的，也可以用过去时。
2、was
3、lived;second
都可以，看语境吧

Answer 2

swimming ，is ，lives /second 。

Answer 3

1. are swimming2. are3. lives; second

Answer 4

1look，the boys are swimming in the river.
2there is some water on the table.
3he lives on the second floor.