I can't remember all these English word a little.s I can't remember all these English words

If you mean it's ちょっと難しい, you could say "It's a little difficult to remember all these English words", or "It's a bit difficult to remember all these English words", or something like that.

I can't remember English word a little.s I can't remember English words

I can't remember the English word a littls I memorize. I can't remember the English words I memorize.

I'm trying to memorizinge 100 English words of 100 in one day. I'm trying to memorize 100 English words in one day.

- Continuous form for the active verb in the sentence (in this case "to try" = "trying") - Attach the number before the noun ("100 English words")

I try memorizing 100 English words of 100 in one day. I try memorizing 100 English words in one day.

I try memorizing 100 English words of 100 in one day. I try memorizing 100 English words in one day.

bBut I remember English word only 50 tomorrowcan only remember 50 words the next day. But I can only remember 50 words the next day.

- As you are talking about the day after a non-specified day, it's better to say 'the next day' rather than 'tomorrow' (which sounds more concrete). - Since you're talking about your 'ability to do something', it's better to add 'can'.

but I will remember English word only 50 tomorrowonly 50 of the English words the next. but I will remember only 50 of the English words the next.

but I remember about 50 English word only 50 tomorrows the next day. but I remember about 50 English words the next day.

Why?? Why??

Because our brain doesn't like memorizing. If there are no context or if we don't understand, it's like cramming for an exam which most times go wrong. If you want to memorize English words, unless it is compulsory, it's better to learn these words little by little. Maybe 5, 10 or 20 per day. 100 is too much. When you're learning them, use them in sentences. You can make sentences using things around you. "Today was fabulous". "That book is a fantastic read". Something like this. The most important thing is to use the words because if you don't use them, you'll forget them.

I will memorize English words before I sleep. I will memorize English words before I sleep.

- Word will be plural here since you are memorizing many words. - Actually, 'before sleep' is OK, but 'before I sleep' helps show that you are talking about yourself.

I will memorize more English words before sleeping. I will memorize more English words before sleeping.

I will memorize English words before I sleep. tonight. I will memorize English words before I sleep tonight.