①be able to/can的區(qū)別

“Can” is used in the present tense. It is used to talk about our ability to do things.

“Be able to”?is also possible in these cases; however, it sounds a bit more formal here.

（更正式）

e.g.

--She can speak English well.

??她英語(yǔ)講得很好。

--She is able to speak English well.

??她英語(yǔ)講得很好。

?

To talk about things that we managed to do on specific occasions in the past, we cannot use could. Instead, we use was/were able to. The verb managed, succeeded (in…v+ing) are also possible in this case.（在過(guò)去的特定場(chǎng)景下，不能用could，只能用was able to）

e.g.

--I?was able to?get some really good bargains in the sale.

?(NOT I could get some really good bargains in the sale.)?

?我能在打折時(shí)，買到不錯(cuò)的便宜貨。

?

②either…or…

We use “either… or…” to connect items which are the same grammatical type, e.g. words, phrases, clauses.

e.g.

--I’ve saved some money to buy either a DVD player or an MP3 player.

我存了些錢，要么買一個(gè)DVD，要么買MP3。

--You can stay either with me or with Janet.

你可以和我或者Janet呆在一起。

--Either I drive to the airport or I get a taxi.

要么我開車去機(jī)場(chǎng)，或者打出租車去。