并列連詞

用法

例句

and

表并列或順承關(guān)系

He came into the classroom and put his schoolbag on the desk.

用于“祈使句，and +陳述句”結(jié)構(gòu)

Be careful, and you will make fewer mistakes.

or

意為“或者”，表示任選其一

Do you want to go the zoo or the museum?

意為“否則”，用于“祈使句，or +陳述句”結(jié)構(gòu)

Please be quick, or we will miss the last bus.

so

表示因果關(guān)系

It’s raining heavily now, so we have to put off the P.E class.

for

表示原因，及附帶理由

I must be off now, for it is getting late.