Hi Helen, Yes, both are okay in spoken English, but in written English, it's best to include the "of." 希望我帮了你。还有问题请别怕问。

Thanks. But I thought the order is acceptable?

And 'of' is definitely not necessary, whether written or spoken

No not really - the order is wrong. If we have the meeting today, half the class won't come. The way you write it stresses the wrong thing.

both ok