In Prepositions^x, Present perfect^x, Gerunds^x

Goodman, MrP thanks for your help.It's really important for me to know how native speakers perceive my written and spoken English. One more question: Is there any difference between first and second sentences?Which sentence would you prefer to use in real life situation? Situation: A man,...

Additionally: 1) Can we rely on his installing all our equipment correctly? ] This is fine; but many native speakers would say "...on him installing all our..." 2) I object to his installing our equipment. ] Again, fine; but many native speakers would say "...to him installing..." 3) The...

1.How much water does that tank..........? a) comprise b) include c) consist d) contain (I'm not sure between 'comprise' and 'contain') "comprise" takes as its object(s) persons or things that are constituent parts. "That tank comprises a lot of water" says that a lot of water is a...