need +to do否定 don’t/ doesn’t need +to do Does he need to go so soon? 他这么快就要走吗? He doesn’t need to go.他不必走。 2. need +名词 They need our help. 他们需要我们的帮助。 3. need doing表示被动含义。 The clothes need washing.这些衣服该洗了。