Mary is sad because she can't sing well.

Mary is sad because she can't sing well. Because she is sad . mary is sad because of what tom said.这句话对吗?后面是个句子 为什么不用because做连词 对Mary is very sad提问 Mary is tired,because什么 how sad the suol is .when it is sad because of love. I'm sad because my mother is ill 对because my mother is ill 提问 -Why does Mary look so __?-Because she never takes exercise.A.happy B.sad C.healthy D.unhealthy Mary seldom smiles.She is usually too sad.Mary seldom smiles.She is usually too sad.1、为什么第一个不是be + seldom?2、为什么第二个不是She usually too sad.第二个是因为要be + the boy is little sad because he can't watch histhe boy is little sad because he can't watchhis favourite cartoons lisa sad is ,because she her leg is hurts连词成句 She is sad (because she failed the math test).对括号部分提问 ls she happy?---no.she is sad,because she failed her math test.的意思. Never frown,even when you are sad,because you never know who is falling in I am sad because my mother is ill.的句型转换 Never frown,even when you are sad,because you never know who is falling in ---Why isn't he very __ (sad)?----Because he is late for school.词形变化 never forwn,even when you are sad.because you never know who is falling in