很高兴能回答您的问题!
1.I will go to visit London next week.
I (am going to) visit London next week.
2.The boy can make his bed by himself.
The boy (is able to) make his bed by himself.
【can=be able to】
3.John often helps his mother do housework.
John often (helps) his mother (with) housework.
【help sb do= help sb to do=help sb with】
4.It took us ten hours to go through the forest.
We (spent) ten hours (going) through the forest.
【it takes/took sb sometime to do=spend(过去式为spent) sb (in) doing sth】
5.I don't want to do this kind of work.
I (would not like) to do this kind of work.
【want to do=would like to do（题目的是否定结构）】
6.To learn English well is hard for me.
It (is hard) for me (to learn) English well.
以上就是我的参考答案,希望能对您有一定的帮助,