2
Considering a similar pair of examples from here,
https://dictionary.cambridge.org/grammar/british-grammar/since
I think there's a slight difference: technically, in version 1 'since' refers to an event (since she told him) while 'since then' refers to 'two days ago' (since that time). Reference to the event (since) in this particular sentence sounds more ...
2
"Over" here meams "by means of" or "using".
Can you repeat it over the comlink.
Files can be sent over the internet.
You can upload files to the server over FTP.
This seems to be mainly used in IT.
1
Generally, you can't. For example, if you replace the phrase 'ask a question' with 'ask for a question', it will turn question into requested thing: the preposition 'for' here precedes that thing (= the person who asks would like to be asked a question). Sometimes, in informal speech that preposition (before the desired 'forgiveness' in your example) is ...
1
We would normally say the boss of a company, especially when they are the only boss.
"Boss" is a widely used term, but it isn't a job description. It could be used in place of "manager", but that word really describes what someone does - they manage people, or budgets, or whatever. "Boss" just says they are in charge generally. A person's job role is far ...
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