1a] She cannot make up thefasts that she missed because she is too weak

1a]
no excuse, it will not be accepted, because the Prophet (blessings and peace of Allah be upon him) said: “Whoever does an action that is not part of this matter of ours will have itrejected.” And because he has transgressed the limits set by Allah, and transgressing the limits set by Allah is wrongdoing, and good deeds are not accepted from the wrongdoer. Allah, may He be exalted, says (interpretation of themeaning):
“And whoever transgresses the limits ordained by Allah, then such are the Zalimoon (wrong-doers, etc.)”
[al-Baqarah 2:229].
And just as if he did this act of worship before the time for it began, it wouldnot be accepted from him,by the same token if he does it after the time for it has ended it will not be accepted from him unless he had an excuse.
End quote from Majmoo‘ Fataawa ash-Shaykh Ibn ‘Uthaymeen, 19/89
Thirdly:
If a person is not able to make up what he owes ofRamadan, because his excuse is ongoing, such assickness for which there isno hope of a cure, then hehas to feed one poor person for each day.
Shaykh Muhammad ibn Saalih al-‘Uthaymeen (may Allah have mercy onhim) was asked:
There is a woman who did not fast during Ramadan because of giving birth, and she did not make up that month. That was a long time ago,and she cannot fast. Whatis the ruling?
He replied:
What is this woman has to do is repent to Allah from what she has done, because it is not permissible for a person to delay making up Ramadan fasts until the next Ramadan except with a legitimate shar‘i excuse. So she has to repent, then if she is able to fast, even if it is on separate days, then she should fast. If she is not able to fast, then it depends. If it is for an ongoing reason, she should feed one poor person for each day; if it isfor a temporary reason which it is hoped will come to an end, she should wait until that reason no longer applies, then make up the days she owes. End quote
19/answer to question no.361
Fourthly:
What the Muslim should do is guard his oaths and not make too many vows.Allah, may He be exalted, says (interpretation of themeaning):
“And protect your oaths (i.e. do not swear much)”
[al-Maa’idah 5:89].
If he breaks his oath, thenhe must offer expiation. Allah, may He be exalted, says (interpretation of themeaning):
“Allah will not punish you for what is unintentional in your oaths, but He will punish you for your deliberate oaths; for its expiation (a deliberate oath) feed ten Masakin (poor persons), on a scale of the average of that with which you feed your own families; or clothe them; or manumit a slave.But whosoever cannot afford (that), then he should fast for three days…”
[al-Maa’idah 5:89].
It is not valid to offer expiation by fasting, except for one who cannot afford to feed or clothe ten poor persons, or to free a slave.
See the answer to question no. 45676 for detailed information on expiation for breaking an oath (kafaarat yameen).
Fifthly:
If a person is unable to offer expiation, in that he cannot make up the days when he did not fast in Ramadan, or feed the poor for that, or he is unable to offer expiation for breaking an oath altogether, then the obligation to feed the poor and offer expiation is waived in his case, because of the shar‘i principle that obligations are waived when one is unable to fulfil them.
Shaykh Ibn ‘Uthaymeen (may Allah have mercy onhim) said: If a person is required to offer expiation for breaking an oath, but he cannot affordto feed poor persons and he is not able to fast, thenit is waived in his case, because Allah, may He be exalted, says (interpretation of the meaning):
“So keep your duty to Allaah and fear Him as much as you can”
[al-Taghaabun 64:16]
“Allaah burdens not a person beyond his scope”
[al-Baqarah 2:286].
And the Prophet (blessings and peace of Allah be upon him) said: “If I command you do a thing, then do as much of it as you can.”
And he does not have to do anything, because one of the established principles (in Islam) is thatobligations are waived if one is unable to do them, and one should then move to the alternative, ifthere is an alternative, or to something else if there is no alternative. If the alternative is not possible either, then it is waived altogether.
End quote from Fataawa Noor ‘ala’d-Darb
We should point out here that there is a difference between real inability to fast and simply fearing hardship. Whatever a person decides, he will be questioned about that, so he should fear Allah regarding that and realisethat Allah, may He be glorified and exalted, can see into his heart and knows how he really is; He knows whether he is really incapable or :->
/ - - - :-> Transtors: 1.http://free-translation.imtranslator.net/lowres.asp 2.http://translate.google.com/m?twu=1&hl=en&vi=m&sl=auto&tl=en