(2)vt.&vi.to bear (oneself) in a socially accepted or polite way举止适当或有礼

你应该学会举止得体。You should __________.

【keys】 (learn to behave)

(3)vi.(of things) to act in a particular way

（指事物）有某种作用

我的摄像机自从修好后一直很正常。

My camera __________ since it was repaired.

【keys】 (has been behaving well)

2.This means going back to a place where we left the chimp family sleeping in a tree the night before.

这意味着我们要返回我们前一天晚上我们离开时黑猩猩睡觉的大树旁。

动名词

百闻不如一见。Seeing is believing.

他喜欢在余暇听音乐。He __________ (enjoys listening to music) in his spare time.

他现在正在游泳池里练习游泳。He __________ in the swimming pool now.(is practicing swimming)

3.But the evening makes it all worthwhile.

但是到傍晚时候我们觉得这一切都是值得的。

worthwhile adj.值得的　可作定语和表语

a worthwhile experiment/job

The experiment is worthwhile.

It is worthwhile to do sth./doing sth.

It is worthwhile to do the job/ doing the job.

比较worth prep./n.

be worth (doing) sth.常主动表被动

这本书很值得一读。

The book is _________.

【keys】 (well worth reading)

= It is worthwhile to read the book.

比较:worthy

be worthy of doing sth.