forgetful

1.forgetful后面接of。例如：One must not be forgetful of one's social obligations. 用be forgetful of往往不及用forget自然，如Don't be forgetful of what I have just told you不及Don't forget what I have just told you自然。

2.forgetful后面偶尔接以that引导的从句。例如：You seem to be forgetful that all work and no play makes Jack a dull boy.