专题训练(二)　 动词变化

◆技巧点拨

如果需要填写的动词后面有by，则用过去分词，表示被动意义。如果所需填写的动词前面是一个句子并且有逗号，一般应用现在分词表示伴随或结果。如果需要填入的动词前有and,或者and后面需要填入动词，一般考虑and前后的动词形式相同。　

◆活学活用　

(一)用所给动词的适当形式填空。　

(1)An old man______________(support)by a young girl came out of the hall.　

(2)______________(frighten) by the stranger,the girl ran away in a hurry.

(3)Football is played in over 80 countries,_______________(make) it the most popular game in the world.　

(4)A few students sat under the tree,_______________(discuss) something heatedly.　

(5)If you eat brain foods regularly,they helped you pay attention,keep you motivated,improve your memory and ______________(less)stress from studies.