Question

-look over there！Tommy，along with his parents，_____(plant )trees in the garden-yes

-look over there！Tommy，along with his parents，_____(plant )trees in the garden-yes，how happy they are！

Answer 1

-look over there！Tommy，along with his parents，__is planting___(plant )trees in the garden-yes，how happy they are！
1、look over there！告诉你这句话是现在进行时。
2、along with his parents是插入语，是题目用来迷惑你的，做题时要把它去掉。
3、找出题目的主干：Tommy（主语）___(plant )（谓语）trees （宾语）in the garden-yes（状语）。
4、Tommy为第三人称单数，又是现在进行时，填is planting。
祝你学习进步！有什么英语问题来问我哦！

Answer 2

is planting

希望我的回答能够帮到你。如有疑问，欢迎追问。O(∩_∩)O

Answer 3

is planting
with 后的不做真正主语