Check sentences please

Anonymous wrote:

Hi, Are they correct? 1. They are all correct grammar. -- What is the function of 'grammar'? 2. stepping into role -- Is  a 'role' idiomatic in this context and therefore there is no need for an English article? 3. update member's details -- There are member's functions similar to 'girl's schools', where 'member's' and 'girl's' are functioning as classifying adjectives? It seems like an affirmative sentence. If you want to make a question you should write something like that : There are member's functions similar to 'girl's schools'. Where is it clear that 'member's' and 'girl's' are classed as adjectives? 4. the old patterns of mental activity could be broken down and new ones built. --  Is this an elliptical construction in which  it should be "new ones built"? 5. If human behavior is malleable, then who better to mold it than the technicians who understand how the mechanism works? -- Is the underlined part a complete clause or not and uses only as informal style ? Do you have any other explanations?