The group of words which make some sense but not complete sense is called a phrase. Examples of phrases (marked in bold) are:
in the east (example1), which you may find in a sentence: The sun rises in the east. the mountain tops (example2), which you may find in a sentence: The mountains tops were covered with snow. how to do it (example3), which you may find in a sentence: Show me how to do it.
The group of words containing subject and predicate but not constituting a complete sentence is called a clause. In the following sentences, clauses are italicized with subjects and predicates mentioned while phrases are marked in bold:
- He (subject) has a chain (predicate) which is made of gold.
- I think that you (subject) have made a mistake (predicate).
- We (subject) cannot go out safely (predicate) while it is raining.