Claim to do sth.

The makers of aspirin claim that small doses will reduce one's risk of heart attack.

They say that.....

He claims to be the real heir to the throne.

He says that....

Thanks, philip,

Actually, I know the "claim + that" structure and the "claim to be sth." structure.

I can understand these two phrases.

But I don't know "claim to do sth.". I am not sure whether there is such usage concerning this word. If there is such usage, what does it mean? Does it means "demand to do sth. " or "allege that they have done or will do sth. "

Yes, "claim to do" does mean "allege that it does"
Example: Here's what they claim do do: (list of claims)
Some tailors claim to do business with the movie stars.

These politicians claim to represent all of their constituents.
I don't claim to understand their motives.

My friends claimed to support the troops by tying yellow ribbons on their trees.

Hello, AlpheccaStars

In "allege that it does", you use the word "does" rather than "has done" or "will do", so I think you mean the current state, right?

But I feel that generally, "to do" means something will happen in future, that is, it has not happened yet, right?

Thus, could I say that "he claim to do something" means that "he alleges that he will do something", th

Hi Winkie:

The infinitive does not have any tense, so you have to look at the main verb.

The politicians claim to represent all the people. - Present tense. Remember that a claim might be true, or might not be true.

He claims to do good deeds. Present tense. (But here, you do not know if he will do good deeds or will not do good deeds. He is only making a statement. Y

AlpheccaStars

Thanks a lot,

But I don't think you understand what I am talking about.

With another word "plan" as an example, in the sentence "I plan to buy a TV", the verb "plan" is in present tense. That's obvious. I also know that the verb "plan" or the sentence is present tense. However, that's not my focus. My focus is on the thing - buying a TV. Although the se