How to use sentence of No sooner

If the expression no sooner appears at the beginning of a sentence, the word than must introduce the second clause. Note also that the auxiliary precedes the subject.

Structure of the no sooner sentence:

             no sooner + auxiliary + subject+ verb + than + subject+ verb

For example:

• No sooner had we started out for India than it started to rain. 
• No sooner will he arrived than he will to leave. 
• No sooner had she entered the building than she felt the presence of somebody else.

Note: No longer means not anymore. Never use not longer in a sentence that has his meaning.

• John no longer studies at the university.

          (John does not study at the university anymore.)

• Cynthia may no longer use the library because her card has expired

          (Cynthia may not use the library anymore)