Structure 2013-08-13

p. 240-241
find out: discover information
big issue: something that is important to think about
avoid: stay away from
comment: statement of opinion
embarrassing stuff: stuff that you are ashamed of and don't want other people to see or know about
content: ideas, information, and pictures in a book or on a website
involved: taking part in something
network (v): connect with people who also know each other
privacy: the protection of personal information
resource: something valuable or useful
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MODALS:
can, could, may, might, (shall), should, will, would, must, had better, ought to
form:   subject + modal + base form
     (Modals never change form for tense or he/she/it.)
"SIMILAR EXPRESSIONS":
[have] to + base form ("have" changes with tense and he/she/it)
[be] able to + base form ("be" changes with tense and subject)
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advice:
You could take the train. = this is one of your choices (weak advice)
You ought to take the train. = You should take the train. = this is the best choice (but you can choose something different)
     Note: "ought to" is more formal than "should", and it isn't used much in questions and negatives
You had better take the train. = urgent advice; if you don't take the train, something bad will happen (If you take the bus, you'll be late.)
You must take the train. = You have to take the train. = this is your only choice; the bus doesn't go where you want to go
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You must not take the train. = it's prohibited; you can't do it (mustn't - more common in British English)
You don't have to take the train. = it's not necessary; whatever you want to do, you can do
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conclusions: (best guesses from the information I have)
She could be sick. = this is one of the possibilities
= She might be sick. = She may be sick.
= She might not feel well. = She may not feel well.

She must be sick. = this is the only (reasonable) possibility; I believe she is sick
= She has to be sick. = She has got to be sick.

She must not feel well. = I don't believe she feels well. It is not a reasonable possibility

She can't be sick. = I don't think it's possible.
= She couldn't be sick.

She must not be at home. I called but she didn't answer her phone.
She can't be at home. All of the lights are off.

She must not have her phone. I called but she didn't answer.
She can't have her phone. I have it right here.
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p. 246-247 (Exercise 1)
have to complete - necessity
must have - necessity
must be - necessity
have to provide - necessity
will be able to hide - ability
have to post - necessity
ought to give - advice
Can someone post - ability
don't have to ask - necessity (asking is not a necessity)
ought to get - advice
cannot remove - ability
can choose - ability
must be - conclusion
should I do - advice
must not give - prohibition
should never give - advice
could use - future possibility
may encounter - future possibility
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Facebook, Twitter, Tumblr, Instagram, MySpace, LinkedIn (professional networking)
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Homework: Exercise 2 (p. 247-248)