Modal verbs are important in English. They often do the job that specific verb tenses do in other languages. The can express probability, possibility, certainty and doubt. Sometimes in English, a “dummy” model verb is used to express certainly. Today we are going to learn how to use the verb “do” as a "dummy" model verb in order to make a positive statement stronger. Using “do” as a model verb is easy and makes the speaker sound confident, articulate, meaningful and fluent. Only use “do” as a model verb when you really mean something.
I like green tea. This is very general.
I do like green tea. This means the same as “I really like green tea.”
I like U2. Again, this is general.
I do like U2. This means "I really like U2."
I like Frank. This is general.
I do like Frank. This means “I really like Frank.”
I like to swim.
I do like to swim. This means “I really like to swim."
Got it?