a  这个周末天气不太好。

　　b  no, it is very grey and cold.  maybe it will rain.

　　b  不好，又阴又冷。可能要下雨。

　　a  do you think it will rain this weekend?

　　a  你认为这个周末会下雨吗？

　　b  perhaps.  why?  are you going somewhere?

　　b  也许吧。什么事？你要去哪里吗？

　　a  well, i was thinking of going to the great wall. 

　　a  哦，我在考虑去长城。

　　b  you should be ok.  take an umbrella just in case it rains.

　　b  你应该可以去。带把雨伞以防下雨。

　　notes    注释

　　1    you can talk about future possibilities such as weather, using maybe it will . . . / maybe it will, e.g. maybe it will rain tomorrow. / maybe it will rain tomorrow; maybe it will be cold next week. / maybe it will be cold next week.

　　在谈论将来的可能性，例如关于天气的情况时可以用maybe it will . . . / 可能会…, 例如： maybe it will rain tomorrow. / 明天可能会下雨； maybe it will be cold next week. / 下周天气可能会冷。

　　2    you can also use perhaps / perhaps instead of maybe / maybe, e.g. perhaps it will rain tomorrow. / perhaps it will rain tomorrow.

　　你也可以用perhaps / 也许来代替 maybe / 可能，例如：perhaps it will rain tomorrow. /明天也许会下雨。

　　3    you can use i was thinking of . . . / i was thinking of . . . when you were considering a possibility, e.g. i was thinking of going to the great wall this weekend. / i was thinking of going to the great wall this weekend.

　　但你考虑某个可能性时，可以用i was thinking of . . . /我在考虑…，例如：i was thinking of going to the great wall this weekend. / 我在考虑本周末去长城。