They have been proposing to make it compulsory for students to take part in sports.

[nelson13]

They have been proposing to make it compulsory for students to take part in sports.

Today I discussed this sentence with two non-native English speakers who are English teachers, who respectively said the tense is OK and not OK. There is no special context; I simply hope to know whether the tense used is acceptable to native English speakers.

I have consulted several dictionaries, but none of them says PROPOSE cannot be used in the progressive tense.(point out my mistake if this is not called PROGRESSIVE)
Thank you very much.

[Raymott]

They have been proposing to make it compulsory for students to take part in sports.

Today I discussed this sentence with two non-native English speakers who are English teachers, who respectively said the tense is OK and not OK. There is no special context; I simply hope to know whether the tense used is acceptable to native English speakers.

I have consulted several dictionaries, but none of them says PROPOSE cannot be used in the progressive tense.(point out my mistake if this is not called PROGRESSIVE)
Thank you very much.

Yes, it's quite OK to say that.

[5jj]

point out my mistake if this is not called PROGRESSIVE

Some call it progessive, while others call it continuous; both are acceptable. Some prefer to think of it as an aspect rather than a tense, but you don't need to worry about that.