Gong zuo

Jin tian gong zuo hen mang. Wo dao gong bang shi zai ba dian, ma shang kai shi wo de gong zuo. Er qie wo de lao ban shi hen lei. Wo xiang ta de tai tai bu shu fu. Jin tian wan shang wo hui qu lian xi zai jian shen fang. Wo hen xi huan lian xi. Ru guo wo bu lian xi wo hui bu shu fu. Wo de jia yi gong you leo ge ren. You yi ge, ge ge, you yi ge mei mei, hiyou yi ge di di. Wo de baba mama fang zi zai chang dao. Wo de po po ye zhu zai nali. Mei ge zhou mo Cha bu duo wo da gao er fu. Zhe ge xing qi liu wo gen baba hui da. Wo xi wang wo men hui ying!

jin tian gongzuo hen mang.

wo ba dian dao bangongshi, mashang kaishi wo de gongzuo.

erqie wo de laoban kan qi lai (seemed) hen lei.

wo xiang shi yinwei (was because) ta de taitai bu shufu.

jintian wanshang wo hui qu jianshenfang.

wo hen xihuan jianshen(健身).

ruguo bu jianshen wo hui bu shufu.

wo de jia li yigong you liu ge ren.

wo you yi ge gege, yi ge didi, hai you yi ge meimei. 

wo baba mama de fangzi zai changdao.

wo de popo ye zhu zai nali. (husband's mother?)

wo chabuduo mei ge zhoumo dou(都 hui(会 qu(去 da gaoerfu qiu(球

zhe ge xingqiliu wo hui gen baba qu(去 da.

wo xiwang wo men hui ying.

Gong zuo

Jin tian gong zuo hen mang.

Wo dao gong bang shi zai ba dian, ma shang kai shi wo de gong zuo.

gong ban shi - Are you referring to an office? If so, it should be ban gong shi.

I suggest you drop "zai"

ba dian - at eight? It sounds better to me if it is placed before the verb "dao".

Er qie wo de lao ban shi hen lei.

And my boss was tired? - You can drop "shi". "lei" is more like a verb than an adjective here. 

Wo xiang ta de tai tai ke neng bu shu fu (ba).

Jin tian wan shang wo hui qu lian xi zai jian shen fang.jian shen. 

Wo hen xi huan lian xi. jian shen, right?

Ru guo wo bu lian xi wo hui bu shu fu.

Wo de jia yi gong you leoliu ge ren. You yi ge, ge ge, you yi ge mei mei, hiyou yi ge di di. Wo de baba mama de fang zi zai chang dao. Wo de po po ye zhu zai nali.

Mei ge zhou mo Cha bu duo wo da gao er fu.

My version: Wo cha bu duo mei ge zhou mo dou da gao er fu.

Zhe ge xing qi liu wo gen baba hui da(hui)qu da gao er fu. Wo xi wang wo men hui ying!

Hope it helps!

Gong zuo

Jin tian gong zuo hen mang. Wo dao gong bang(I can't think of a word from it... Can you tell me?) shi zai ba dian, ma shang kai shi wo de gong zuo. Er qie wo de lao ban shi hen lei. Wo xiang ta de tai tai bu shu fu. Jin tian wan shang wo hui qu lian xi zai jian shen fang(What's this that you are practicing?). Wo hen xi huan lian xi. Ru guo wo bu lian xi wo hui bu shu fu. Wo de jia yi gong you leoliu(You use Mac too much?!) ge ren. You yi ge, ge ge, you yi ge mei mei, hihai you yi ge di di. Wo de baba mama fang zi zai chang dao. Wo de po po ye zhu zai na li. Cha bu duo mei ge zhou mo Cha bu duo wo da gao er fu. Zhe ge xing qi liu wo gen baba hui da. Wo xi wang wo men hui ying!

Your sentences are mostly fluent and natural. Great job.

"Cha bu duo" observes the same rule and order with English in that it comes before "frequency",i.e. "Nearly(almost) every weekend"