Need 后面何时加 to，何时不加？ - 英语语法解析

"need" is a verb that typically takes an infinitive (to + verb) to express the meaning of needing to do something. For example:

• I need to go to the store. (I need to go to the store.)
• She needs to finish her homework. (She needs to finish her homework.) However, in some cases, "need" can be used alone without "to". This usually happens in the following situations:

1. In negative sentences, "need" can be followed directly by the verb. For example:

• You don't need to worry. (You don't need to worry.)
• They don't need to know. (They don't need to know.)

2. In interrogative sentences, "need" can be followed directly by the verb. For example:

• Do you need help? (Do you need help?)
• Does she need anything? (Does she need anything?) It is important to note that when "need" is used as a modal verb, it does not need "to". For example:
• I needn't go to work today. (I don't need to go to work today.)
• You needn't worry about it. (You don't need to worry about it.)