H. use ‘one’ (singular) and ‘ones’ (plural) to avoid unnecessary repetition. (e.g. See those two girls? Helen is the tall one and Jane is the short one.)
a. often use them after ‘Which’ in questions. (e.g. You can borrow a book. Which one do you want?)
H1. use ‘~ing’ clauses to say what somebody (or something) is (or was) doing at a particular time. (e.g. Do you know the woman talking to Ken? (the woman is talking to Ken))
a. can also use an ‘~ing’ clause to say what happens all the time, not just at a particular time. (e.g. The road connecting the two villages is very narrow. (the road connects the two villages))
H2. ‘~ed’ clauses have a passive meaning
a. The boy injured in the accident was taken to hospital. (he was injured in the accident) (e.g. The police never found the money stolen in the robbery.
b. can use left in this way, with the meaning ‘not used, still there’. (e.g., We’ve eaten nearly all the chocolates. These are only a few left)
H3. often use ‘~ing’ and ‘~ed’ clauses after there is/ there was etc. (e.g. There were some children swimming in the river)