30:17
STRUCTURE
2680 Views
01:56
READING COMPREHENSION &VOCABULARY
1566 Views
01:52
The Form of Irregular Verbs
1568 Views
01:59
The Tense of the Passive Voice
1700 Views
09:31
Changing from Active into Passive
1427 Views
07:20
The Form of the Passive Voice
1655 Views
03:29
What is the Passive Voice?
1682 Views
03:45
The Form of the Active Voice
1645 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2235 Views
03:20
Since vs For
1754 Views
04:50
Have or Has
1578 Views
00:49
Key Words: Present Perfect
3579 Views
09:03
The Use of the Present Perfect
1632 Views
03:08
Meaning and Form
1682 Views
02:40
Writing Formal Letters
1662 Views
03:10
Language Use
2228 Views
09:35
Parallel Structure
1804 Views
04:35
Prepositions of Instruments and Means
1610 Views
03:27
Polite Requests
1680 Views
06:30
May as a Modal of Permission and Request
1808 Views
04:11
Can as a Modal of Permission and Request
1619 Views
02:50
عناصر الاداء
1531 Views
03:45
شركة ستيرن
1093 Views
01:15
مقياس القيمة المضافة
1352 Views
02:58
مقياس الربحية
1254 Views
02:39
معايير دركر
1459 Views
03:51
مقايس الاداء
1459 Views
01:41
اتخاذ اجراءات تصحيحية
1138 Views
01:52
المرحلة الثانية من الرقابة
1283 Views
02:49
مراحل الرقابة
2730 Views