变频器自整定:怎么判断need单词是实意动词还是情态动词？要有练习！

1 如果need后面接的是动词原型need do ,need就是情态动词:He needed buy a bike.
2 如果need后面接的是need to do(表示主动)和need doing(表示被动),need就是实意动词
He needs to sleep.
The task needs washing.
3 如果need后面接的是名词,need就是实意动词
He needs a car.

看到题中是这样的结构need to do / needs 实意动词

need do情态动词

need / needs to do 实意动词

need do情态动词

need / needs to do 实意动词

need do情态动词
eg: I need to buy some bread.实意动词
I need do it by myself.情态动词

need有情态动词和实义动词两种用法。一般说来，这两种用法在意思上没有什么差别，只是用法差别较大：
例如：
他必须去那儿吗？
正：Need he go there？（need为情态动词）
正：Does he need to go there？（need为实义动词）
但有时候两种用法在意思上也有较大差别：
1．a．He needn't be told．没有必要告诉他。
b．He doesn't need to be told．不需要告诉他了。
（即：他已知道了）
2．didn't need to do/needn't have done：前者表示因为没有做某事的必要，所以没有去做；后者表示某事已经做了，但后来觉得没有必要去做，含有责备或遗憾之味：
I didn't need to get up early this morning，so I stayed in bed until 9 am．今天早上我不必早起，所以我一直睡到上午9点才起床。
That computer was expensive，and what's more，I didn't need to buy such a good one．那台电脑很贵，况且我也没有必要买那样好一台电脑。
详细的可以看这里：）~
http://www.aoklyz.com/bencandy.php?fid=102&id=23782