he can eat some foods 为什么can不加s不是第三人称单数加动词加s吗为什么说清楚我要知道为什么情态动词后不加s说清楚

He has some difficulty （eat）so much food Can she eat some food(改为一般疑问句) 这道题改some变不变any he takes some food If you are h_,you can buy some food to eat in shop. You can play buy some food to eat if you are （h ).怎么填? If you are hungry,you can stop__(study)___(eat)some food.填空 Some children in Africa can't have enough food to eat and they're very t( ). He alays ---- some food to his factory to eat.填brings还是takes 急, Please give ________ some food to eat.He's hungry.A.he B.him C.his D.he's The food smells so nice.He can't wait ______ (eat) it. He must not eat rich food 句中为什么用must而不用can Would you like to eat some ----(food)? Jim would like some food to eat. May we find some food to eat? Anna is on a diet.She c___ eat her favorite food.When her brother is e___chocolate ,she can only eat an apple .Anna has been on a diet for two months .Doctor Tomas f____ pleased with her .Very g___, he said.You can eat some of the foods you like b where can you eat the food above? You can't eat food now.祈使句 He has enough food ___ (eat)