很抱歉,请原谅我,我的英文的确不太好,怎么说?很抱歉,请原谅我,我的英文的确不太好,跟你说话我不得不借助一些工具

pardon me, my english is very limited, i've got to resort some language translation software to communicate with you.

最好不要用poor来形容自己的英文水平..
I am sorry for my broken English.
这里用broken比较生动..而且老外听了也会就得你的英文根本不broken.~~

Very excuse me, beg your pardon I, my Englishs is so poor that I have to ask for help when i talk with you

Sorry, please forgive me, my English in not so good.

如果你所谓的“英语不好”只是词汇量不够的话，不要说自己英语不好，坦言有些词不认识，要用到词典高可以了
Sorry, I do not know some of the words in while we are chatting, so I have to use dictionary.

I'm sorry,but actually my English is not very good.

i am sorry,my english is poor

很抱歉,请原谅我,我的英文的确不太好,跟你说话我不得不借助一些工具
I am sorry for my poor english, so please forgive me to talk with you with h ehelp of some tools

Because of my poor English,I have to use the dictionary while talking,so please don't mind for my slow feedback.

Very excuse me, beg your pardon I, my Englishs really not so good, talk with you I have to ask for help some tools