the first is ok, but the best order is我最近去看过她两次 the second我看得懂这本书or我把这本书看懂or这本书我看得懂 the third is ok， but better not with 去。it become：要上课了，你们快进教室吧。 nothing to say about the first one. the second one, 把and得cannot be used in a same simple sentence the third one, 进is more like the word enter，it‘s vt, but you put a去after that， it becomes a vi. better not be followed by an object directly right?

2) 最近我去过看她两次。 通常这么说：最近我去看过她两次。 3) 我把这本书看得懂。 通常这么说：这本书我看得懂。or 我看得懂这本书。 5) 要上课了，你们快进去教室吧。 通常这么说：要上课了，你们快进教室吧。