I wonder if he ( )ask his brother for help.A、need..B.needs C.need toD.ought应该选那个?请说明一下理由,

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Iwonderifhe()askhisbrotherforhelp.A、need..B.needsC.needtoD.ought应该选那个?请说明一下理由,Iwonderifhe()askhisbro

I wonder if he ( )ask his brother for help.A、need..B.needs C.need toD.ought应该选那个?请说明一下理由,
I wonder if he ( )ask his brother for help.
A、need..
B.needs
C.need to
D.ought
应该选那个?请说明一下理由,

I wonder if he ( )ask his brother for help.A、need..B.needs C.need toD.ought应该选那个?请说明一下理由,
need作行为动词 有人称和数的变化
所以C排除
need作情态动词 只有时态变化 而没有人称和数的变化
所以B排除
D选项不符合句中意思
所以应该选A吧

A
由从句的主语是he, 可以排除C;
need作行为动词时,后面的动词要用to do或doing,排除B;
ought 后接to do,排除D;
这里的need是在含if引导的宾语从句中,说明从句的原句是一般疑问句,所以need作情态动词用